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1bc7523817
428 Commits
Author | SHA1 | Message | Date | |
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Linus Torvalds
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4b78317679 |
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull STIBP fallout fixes from Thomas Gleixner: "The performance destruction department finally got it's act together and came up with a cure for the STIPB regression: - Provide a command line option to control the spectre v2 user space mitigations. Default is either seccomp or prctl (if seccomp is disabled in Kconfig). prctl allows mitigation opt-in, seccomp enables the migitation for sandboxed processes. - Rework the code to handle the conditional STIBP/IBPB control and remove the now unused ptrace_may_access_sched() optimization attempt - Disable STIBP automatically when SMT is disabled - Optimize the switch_to() logic to avoid MSR writes and invocations of __switch_to_xtra(). - Make the asynchronous speculation TIF updates synchronous to prevent stale mitigation state. As a general cleanup this also makes retpoline directly depend on compiler support and removes the 'minimal retpoline' option which just pretended to provide some form of security while providing none" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits) x86/speculation: Provide IBPB always command line options x86/speculation: Add seccomp Spectre v2 user space protection mode x86/speculation: Enable prctl mode for spectre_v2_user x86/speculation: Add prctl() control for indirect branch speculation x86/speculation: Prepare arch_smt_update() for PRCTL mode x86/speculation: Prevent stale SPEC_CTRL msr content x86/speculation: Split out TIF update ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS x86/speculation: Prepare for conditional IBPB in switch_mm() x86/speculation: Avoid __switch_to_xtra() calls x86/process: Consolidate and simplify switch_to_xtra() code x86/speculation: Prepare for per task indirect branch speculation control x86/speculation: Add command line control for indirect branch speculation x86/speculation: Unify conditional spectre v2 print functions x86/speculataion: Mark command line parser data __initdata x86/speculation: Mark string arrays const correctly x86/speculation: Reorder the spec_v2 code x86/l1tf: Show actual SMT state x86/speculation: Rework SMT state change sched/smt: Expose sched_smt_present static key ... |
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Johannes Weiner
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e0c274472d |
psi: make disabling/enabling easier for vendor kernels
Mel Gorman reports a hackbench regression with psi that would prohibit shipping the suse kernel with it default-enabled, but he'd still like users to be able to opt in at little to no cost to others. With the current combination of CONFIG_PSI and the psi_disabled bool set from the commandline, this is a challenge. Do the following things to make it easier: 1. Add a config option CONFIG_PSI_DEFAULT_DISABLED that allows distros to enable CONFIG_PSI in their kernel but leave the feature disabled unless a user requests it at boot-time. To avoid double negatives, rename psi_disabled= to psi=. 2. Make psi_disabled a static branch to eliminate any branch costs when the feature is disabled. In terms of numbers before and after this patch, Mel says: : The following is a comparision using CONFIG_PSI=n as a baseline against : your patch and a vanilla kernel : : 4.20.0-rc4 4.20.0-rc4 4.20.0-rc4 : kconfigdisable-v1r1 vanilla psidisable-v1r1 : Amean 1 1.3100 ( 0.00%) 1.3923 ( -6.28%) 1.3427 ( -2.49%) : Amean 3 3.8860 ( 0.00%) 4.1230 * -6.10%* 3.8860 ( -0.00%) : Amean 5 6.8847 ( 0.00%) 8.0390 * -16.77%* 6.7727 ( 1.63%) : Amean 7 9.9310 ( 0.00%) 10.8367 * -9.12%* 9.9910 ( -0.60%) : Amean 12 16.6577 ( 0.00%) 18.2363 * -9.48%* 17.1083 ( -2.71%) : Amean 18 26.5133 ( 0.00%) 27.8833 * -5.17%* 25.7663 ( 2.82%) : Amean 24 34.3003 ( 0.00%) 34.6830 ( -1.12%) 32.0450 ( 6.58%) : Amean 30 40.0063 ( 0.00%) 40.5800 ( -1.43%) 41.5087 ( -3.76%) : Amean 32 40.1407 ( 0.00%) 41.2273 ( -2.71%) 39.9417 ( 0.50%) : : It's showing that the vanilla kernel takes a hit (as the bisection : indicated it would) and that disabling PSI by default is reasonably : close in terms of performance for this particular workload on this : particular machine so; Link: http://lkml.kernel.org/r/20181127165329.GA29728@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Tested-by: Mel Gorman <mgorman@techsingularity.net> Reported-by: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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a1b3cf6d94 |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Misc fixes: - counter freezing related regression fix - uprobes race fix - Intel PMU unusual event combination fix - .. and diverse tooling fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: uprobes: Fix handle_swbp() vs. unregister() + register() race once more perf/x86/intel: Disallow precise_ip on BTS events perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts() perf/x86/intel: Move branch tracing setup to the Intel-specific source file perf/x86/intel: Fix regression by default disabling perfmon v4 interrupt handling perf tools beauty ioctl: Support new ISO7816 commands tools uapi asm-generic: Synchronize ioctls.h tools arch x86: Update tools's copy of cpufeatures.h tools headers uapi: Synchronize i915_drm.h perf tools: Restore proper cwd on return from mnt namespace tools build feature: Check if get_current_dir_name() is available perf tools: Fix crash on synthesizing the unit |
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Thomas Gleixner
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55a974021e |
x86/speculation: Provide IBPB always command line options
Provide the possibility to enable IBPB always in combination with 'prctl' and 'seccomp'. Add the extra command line options and rework the IBPB selection to evaluate the command instead of the mode selected by the STIPB switch case. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Casey Schaufler <casey.schaufler@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jon Masters <jcm@redhat.com> Cc: Waiman Long <longman9394@gmail.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Dave Stewart <david.c.stewart@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20181125185006.144047038@linutronix.de |
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Thomas Gleixner
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6b3e64c237 |
x86/speculation: Add seccomp Spectre v2 user space protection mode
If 'prctl' mode of user space protection from spectre v2 is selected on the kernel command-line, STIBP and IBPB are applied on tasks which restrict their indirect branch speculation via prctl. SECCOMP enables the SSBD mitigation for sandboxed tasks already, so it makes sense to prevent spectre v2 user space to user space attacks as well. The Intel mitigation guide documents how STIPB works: Setting bit 1 (STIBP) of the IA32_SPEC_CTRL MSR on a logical processor prevents the predicted targets of indirect branches on any logical processor of that core from being controlled by software that executes (or executed previously) on another logical processor of the same core. Ergo setting STIBP protects the task itself from being attacked from a task running on a different hyper-thread and protects the tasks running on different hyper-threads from being attacked. While the document suggests that the branch predictors are shielded between the logical processors, the observed performance regressions suggest that STIBP simply disables the branch predictor more or less completely. Of course the document wording is vague, but the fact that there is also no requirement for issuing IBPB when STIBP is used points clearly in that direction. The kernel still issues IBPB even when STIBP is used until Intel clarifies the whole mechanism. IBPB is issued when the task switches out, so malicious sandbox code cannot mistrain the branch predictor for the next user space task on the same logical processor. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Casey Schaufler <casey.schaufler@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jon Masters <jcm@redhat.com> Cc: Waiman Long <longman9394@gmail.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Dave Stewart <david.c.stewart@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20181125185006.051663132@linutronix.de |
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Thomas Gleixner
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7cc765a67d |
x86/speculation: Enable prctl mode for spectre_v2_user
Now that all prerequisites are in place: - Add the prctl command line option - Default the 'auto' mode to 'prctl' - When SMT state changes, update the static key which controls the conditional STIBP evaluation on context switch. - At init update the static key which controls the conditional IBPB evaluation on context switch. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Casey Schaufler <casey.schaufler@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jon Masters <jcm@redhat.com> Cc: Waiman Long <longman9394@gmail.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Dave Stewart <david.c.stewart@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20181125185005.958421388@linutronix.de |
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Thomas Gleixner
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fa1202ef22 |
x86/speculation: Add command line control for indirect branch speculation
Add command line control for user space indirect branch speculation mitigations. The new option is: spectre_v2_user= The initial options are: - on: Unconditionally enabled - off: Unconditionally disabled -auto: Kernel selects mitigation (default off for now) When the spectre_v2= command line argument is either 'on' or 'off' this implies that the application to application control follows that state even if a contradicting spectre_v2_user= argument is supplied. Originally-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Casey Schaufler <casey.schaufler@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jon Masters <jcm@redhat.com> Cc: Waiman Long <longman9394@gmail.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Dave Stewart <david.c.stewart@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20181125185005.082720373@linutronix.de |
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Linus Torvalds
|
52465bce85 |
Char/Misc driver fixes for 4.20-rc4
Here are some small char/misc driver fixes for issues that have been reported. Nothing major, highlights include: - gnss sync write fixes - uio oops fix - nvmem fixes - other minor fixes and some documentation/maintainers updates Full details are in the shortlog. All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW/ZqSw8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+yks8gCgm0Amv9/GLpE7qZqe/Az2S7t7pm4An2NHYfS1 /vrBi80OCiSLGakl/zs2 =MYVD -----END PGP SIGNATURE----- Merge tag 'char-misc-4.20-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver fixes from Greg KH: "Here are some small char/misc driver fixes for issues that have been reported. Nothing major, highlights include: - gnss sync write fixes - uio oops fix - nvmem fixes - other minor fixes and some documentation/maintainers updates Full details are in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.20-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: Documentation/security-bugs: Postpone fix publication in exceptional cases MAINTAINERS: Add Sasha as a stable branch maintainer gnss: sirf: fix synchronous write timeout gnss: serial: fix synchronous write timeout uio: Fix an Oops on load test_firmware: fix error return getting clobbered nvmem: core: fix regression in of_nvmem_cell_get() misc: atmel-ssc: Fix section annotation on atmel_ssc_get_driver_data drivers/misc/sgi-gru: fix Spectre v1 vulnerability Drivers: hv: kvp: Fix the recent regression caused by incorrect clean-up slimbus: ngd: remove unnecessary check |
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Linus Torvalds
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4cd731953d |
USB fixes for 4.20-rc4
Here are a number of small USB fixes for 4.20-rc4. There's the usual xhci and dwc2/3 fixes as well as a few minor other issues resolved for problems that have been reported. Full details are in the shortlog. All have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW/ZsOg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ymPlACeO1ii05UG6Mb47AC0sZbgMk5diWwAnRK3A0Pe fSupZy5v6u1HBEormFco =5k0S -----END PGP SIGNATURE----- Merge tag 'usb-4.20-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are a number of small USB fixes for 4.20-rc4. There's the usual xhci and dwc2/3 fixes as well as a few minor other issues resolved for problems that have been reported. Full details are in the shortlog. All have been in linux-next for a while with no reported issues" * tag 'usb-4.20-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: cdc-acm: add entry for Hiro (Conexant) modem usb: xhci: Prevent bus suspend if a port connect change or polling state is detected usb: core: Fix hub port connection events lost usb: dwc3: gadget: fix ISOC TRB type on unaligned transfers Revert "usb: gadget: ffs: Fix BUG when userland exits with submitted AIO transfers" usb: dwc2: pci: Fix an error code in probe usb: dwc3: Fix NULL pointer exception in dwc3_pci_remove() xhci: Add quirk to workaround the errata seen on Cavium Thunder-X2 Soc usb: xhci: fix timeout for transition from RExit to U0 usb: xhci: fix uninitialized completion when USB3 port got wrong status xhci: Add check for invalid byte size error when UAS devices are connected. xhci: handle port status events for removed USB3 hcd xhci: Fix leaking USB3 shared_hcd at xhci removal USB: misc: appledisplay: add 20" Apple Cinema Display USB: quirks: Add no-lpm quirk for Raydium touchscreens usb: quirks: Add delay-init quirk for Corsair K70 LUX RGB USB: Wait for extra delay time after USB_PORT_FEAT_RESET for quirky hub usb: dwc3: gadget: Properly check last unaligned/zero chain TRB usb: dwc3: core: Clean up ULPI device |
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Peter Zijlstra
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2a5bf23d5b |
perf/x86/intel: Fix regression by default disabling perfmon v4 interrupt handling
Kyle Huey reported that 'rr', a replay debugger, broke due to the following commit:
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Will Deacon
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544b03da39 |
Documentation/security-bugs: Postpone fix publication in exceptional cases
At the request of the reporter, the Linux kernel security team offers to postpone the publishing of a fix for up to 5 business days from the date of a report. While it is generally undesirable to keep a fix private after it has been developed, this short window is intended to allow distributions to package the fix into their kernel builds and permits early inclusion of the security team in the case of a co-ordinated disclosure with other parties. Unfortunately, discussions with major Linux distributions and cloud providers has revealed that 5 business days is not sufficient to achieve either of these two goals. As an example, cloud providers need to roll out KVM security fixes to a global fleet of hosts with sufficient early ramp-up and monitoring. An end-to-end timeline of less than two weeks dramatically cuts into the amount of early validation and increases the chance of guest-visible regressions. The consequence of this timeline mismatch is that security issues are commonly fixed without the involvement of the Linux kernel security team and are instead analysed and addressed by an ad-hoc group of developers across companies contributing to Linux. In some cases, mainline (and therefore the official stable kernels) can be left to languish for extended periods of time. This undermines the Linux kernel security process and puts upstream developers in a difficult position should they find themselves involved with an undisclosed security problem that they are unable to report due to restrictions from their employer. To accommodate the needs of these users of the Linux kernel and encourage them to engage with the Linux security team when security issues are first uncovered, extend the maximum period for which fixes may be delayed to 7 calendar days, or 14 calendar days in exceptional cases, where the logistics of QA and large scale rollouts specifically need to be accommodated. This brings parity with the linux-distros@ maximum embargo period of 14 calendar days. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Amit Shah <aams@amazon.com> Cc: Laura Abbott <labbott@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Co-developed-by: Thomas Gleixner <tglx@linutronix.de> Co-developed-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Tyler Hicks <tyhicks@canonical.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Zhao Wei Liew
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e531efa1e9 |
Documentation: cpufreq: Correct a typo
Fix a typo in the admin-guide documentation for cpufreq. Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Kai-Heng Feng
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781f0766cc |
USB: Wait for extra delay time after USB_PORT_FEAT_RESET for quirky hub
Devices connected under Terminus Technology Inc. Hub (1a40:0101) may fail to work after the system resumes from suspend: [ 206.063325] usb 3-2.4: reset full-speed USB device number 4 using xhci_hcd [ 206.143691] usb 3-2.4: device descriptor read/64, error -32 [ 206.351671] usb 3-2.4: device descriptor read/64, error -32 Info for this hub: T: Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=480 MxCh= 4 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=1a40 ProdID=0101 Rev=01.11 S: Product=USB 2.0 Hub C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub Some expirements indicate that the USB devices connected to the hub are innocent, it's the hub itself is to blame. The hub needs extra delay time after it resets its port. Hence wait for extra delay, if the device is connected to this quirky hub. Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: stable <stable@vger.kernel.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linus Torvalds
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601a88077c |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar: "A number of fixes and some late updates: - make in_compat_syscall() behavior on x86-32 similar to other platforms, this touches a number of generic files but is not intended to impact non-x86 platforms. - objtool fixes - PAT preemption fix - paravirt fixes/cleanups - cpufeatures updates for new instructions - earlyprintk quirk - make microcode version in sysfs world-readable (it is already world-readable in procfs) - minor cleanups and fixes" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: compat: Cleanup in_compat_syscall() callers x86/compat: Adjust in_compat_syscall() to generic code under !COMPAT objtool: Support GCC 9 cold subfunction naming scheme x86/numa_emulation: Fix uniform-split numa emulation x86/paravirt: Remove unused _paravirt_ident_32 x86/mm/pat: Disable preemption around __flush_tlb_all() x86/paravirt: Remove GPL from pv_ops export x86/traps: Use format string with panic() call x86: Clean up 'sizeof x' => 'sizeof(x)' x86/cpufeatures: Enumerate MOVDIR64B instruction x86/cpufeatures: Enumerate MOVDIRI instruction x86/earlyprintk: Add a force option for pciserial device objtool: Support per-function rodata sections x86/microcode: Make revision and processor flags world-readable |
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Ingo Molnar
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23a12ddee1 |
Merge branch 'core/urgent' into x86/urgent, to pick up objtool fix
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
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5f21585384 |
for-linus-20181102
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAlvchGgQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpj/1D/4kEQx4ncnFoZk8QshHV1L++rH3BbcLjQDd Wbh9ZSIQdI/gHTzS6bE7x3YfcbpMWPMO3+jFawdfRiFTEjlF8vQ+mnJ+Btb3z4D6 mGEeFGVhHExlp2a0x/Ma8YWVNlMB7BE8Tq73bZEVMY+9lbpmDW/vp7Sfa87LBDKQ ZmY+My+VdHN7qLtQ7t3W/HtpbU+kcXMMd3ICjK4i+ofXy6mynk4+oQ2jwyXc5L86 UCJCsTsSRr3CgbnkW/uprHo0XHk8i7O/4C3oR+x4pAIxCCa9g+vmw0EO9fvi/2iQ qe8jKdm7Y09xu/TiPBa7iz45tdh0cNMJKo3OezmSF9Np+r69KL5C/U4GRPKN3Iwm keoqn14ScABkYMSe4ys1AdEgKD6bNUaW3r/lJxTH2oUR23mjnCLp7c4WD/G+MlbB CzoakQyCHTZmDFLr2Kc8bkjmpil2T2UFfmLIDAu30LWIYeSGpiIO/V+g1foJMF2f 06ERltNvgX1BJjoh4NSWySLEf1ZtkUU60NeATRol6gwhnIyLrHsgfm6OEhqlW/7x Xc1BWyzX7K6c3Dskk/u5aSRyXOyRC9KkMt3/2XexeDNHkte9yMH0IgSvopPBuER8 +iPvPjNp7ychTKZB3zpSnlqGgePTjbufIEBtO3OyUmDZKjUqxahtxkQfmPhoclu+ XdR4ArcqNg== =0zM4 -----END PGP SIGNATURE----- Merge tag 'for-linus-20181102' of git://git.kernel.dk/linux-block Pull block layer fixes from Jens Axboe: "The biggest part of this pull request is the revert of the blkcg cleanup series. It had one fix earlier for a stacked device issue, but another one was reported. Rather than play whack-a-mole with this, revert the entire series and try again for the next kernel release. Apart from that, only small fixes/changes. Summary: - Indentation fixup for mtip32xx (Colin Ian King) - The blkcg cleanup series revert (Dennis Zhou) - Two NVMe fixes. One fixing a regression in the nvme request initialization in this merge window, causing nvme-fc to not work. The other is a suspend/resume p2p resource issue (James, Keith) - Fix sg discard merge, allowing us to merge in cases where we didn't before (Jianchao Wang) - Call rq_qos_exit() after the queue is frozen, preventing a hang (Ming) - Fix brd queue setup, fixing an oops if we fail setting up all devices (Ming)" * tag 'for-linus-20181102' of git://git.kernel.dk/linux-block: nvme-pci: fix conflicting p2p resource adds nvme-fc: fix request private initialization blkcg: revert blkcg cleanups series block: brd: associate with queue until adding disk block: call rq_qos_exit() after queue is frozen mtip32xx: clean an indentation issue, remove extraneous tabs block: fix the DISCARD request merge |
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Dennis Zhou
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b5f2954d30 |
blkcg: revert blkcg cleanups series
This reverts a series committed earlier due to null pointer exception bug report in [1]. It seems there are edge case interactions that I did not consider and will need some time to understand what causes the adverse interactions. The original series can be found in [2] with a follow up series in [3]. [1] https://www.spinics.net/lists/cgroups/msg20719.html [2] https://lore.kernel.org/lkml/20180911184137.35897-1-dennisszhou@gmail.com/ [3] https://lore.kernel.org/lkml/20181020185612.51587-1-dennis@kernel.org/ This reverts the following commits: |
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David Hildenbrand
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dee6da22ef |
memory-hotplug.rst: add some details about locking internals
Let's document the magic a bit, especially why device_hotplug_lock is required when adding/removing memory and how it all play together with requests to online/offline memory from user space. Link: http://lkml.kernel.org/r/20180925091457.28651-7-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Pavel Tatashin <pavel.tatashin@microsoft.com> Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Hocko <mhocko@suse.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: John Allen <jallen@linux.vnet.ibm.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Len Brown <lenb@kernel.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Mathieu Malaterre <malat@debian.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: YASUAKI ISHIMATSU <yasu.isimatu@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Ingo Molnar
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4b783dd6a4 |
Merge branches 'x86/early-printk', 'x86/microcode' and 'core/objtool' into x86/urgent, to pick up simple topic branches
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
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345671ea0f |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: - a few misc things - ocfs2 updates - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits) hugetlbfs: dirty pages as they are added to pagecache mm: export add_swap_extent() mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE mm: thp: relocate flush_cache_range() in migrate_misplaced_transhuge_page() mm: thp: fix mmu_notifier in migrate_misplaced_transhuge_page() mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t mm/gup: cache dev_pagemap while pinning pages Revert "x86/e820: put !E820_TYPE_RAM regions into memblock.reserved" mm: return zero_resv_unavail optimization mm: zero remaining unavailable struct pages tools/testing/selftests/vm/gup_benchmark.c: add MAP_HUGETLB option tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option tools/testing/selftests/vm/gup_benchmark.c: allow user specified file tools/testing/selftests/vm/gup_benchmark.c: fix 'write' flag usage mm/gup_benchmark.c: add additional pinning methods mm/gup_benchmark.c: time put_page() mm: don't raise MEMCG_OOM event due to failed high-order allocation mm/page-writeback.c: fix range_cyclic writeback vs writepages deadlock ... |
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Roman Gushchin
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7a1adfddaf |
mm: don't raise MEMCG_OOM event due to failed high-order allocation
It was reported that on some of our machines containers were restarted with OOM symptoms without an obvious reason. Despite there were almost no memory pressure and plenty of page cache, MEMCG_OOM event was raised occasionally, causing the container management software to think, that OOM has happened. However, no tasks have been killed. The following investigation showed that the problem is caused by a failing attempt to charge a high-order page. In such case, the OOM killer is never invoked. As shown below, it can happen under conditions, which are very far from a real OOM: e.g. there is plenty of clean page cache and no memory pressure. There is no sense in raising an OOM event in this case, as it might confuse a user and lead to wrong and excessive actions (e.g. restart the workload, as in my case). Let's look at the charging path in try_charge(). If the memory usage is about memory.max, which is absolutely natural for most memory cgroups, we try to reclaim some pages. Even if we were able to reclaim enough memory for the allocation, the following check can fail due to a race with another concurrent allocation: if (mem_cgroup_margin(mem_over_limit) >= nr_pages) goto retry; For regular pages the following condition will save us from triggering the OOM: if (nr_reclaimed && nr_pages <= (1 << PAGE_ALLOC_COSTLY_ORDER)) goto retry; But for high-order allocation this condition will intentionally fail. The reason behind is that we'll likely fall to regular pages anyway, so it's ok and even preferred to return ENOMEM. In this case the idea of raising MEMCG_OOM looks dubious. Fix this by moving MEMCG_OOM raising to mem_cgroup_oom() after allocation order check, so that the event won't be raised for high order allocations. This change doesn't affect regular pages allocation and charging. Link: http://lkml.kernel.org/r/20181004214050.7417-1-guro@fb.com Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@kernel.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Alexander Duyck
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f682a97a00 |
mm: provide kernel parameter to allow disabling page init poisoning
Patch series "Address issues slowing persistent memory initialization", v5. The main thing this patch set achieves is that it allows us to initialize each node worth of persistent memory independently. As a result we reduce page init time by about 2 minutes because instead of taking 30 to 40 seconds per node and going through each node one at a time, we process all 4 nodes in parallel in the case of a 12TB persistent memory setup spread evenly over 4 nodes. This patch (of 3): On systems with a large amount of memory it can take a significant amount of time to initialize all of the page structs with the PAGE_POISON_PATTERN value. I have seen it take over 2 minutes to initialize a system with over 12TB of RAM. In order to work around the issue I had to disable CONFIG_DEBUG_VM and then the boot time returned to something much more reasonable as the arch_add_memory call completed in milliseconds versus seconds. However in doing that I had to disable all of the other VM debugging on the system. In order to work around a kernel that might have CONFIG_DEBUG_VM enabled on a system that has a large amount of memory I have added a new kernel parameter named "vm_debug" that can be set to "-" in order to disable it. Link: http://lkml.kernel.org/r/20180925201921.3576.84239.stgit@localhost.localdomain Reviewed-by: Pavel Tatashin <pavel.tatashin@microsoft.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Johannes Weiner
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2ce7135adc |
psi: cgroup support
On a system that executes multiple cgrouped jobs and independent workloads, we don't just care about the health of the overall system, but also that of individual jobs, so that we can ensure individual job health, fairness between jobs, or prioritize some jobs over others. This patch implements pressure stall tracking for cgroups. In kernels with CONFIG_PSI=y, cgroup2 groups will have cpu.pressure, memory.pressure, and io.pressure files that track aggregate pressure stall times for only the tasks inside the cgroup. Link: http://lkml.kernel.org/r/20180828172258.3185-10-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Drake <drake@endlessm.com> Tested-by: Suren Baghdasaryan <surenb@google.com> Cc: Christopher Lameter <cl@linux.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Weiner <jweiner@fb.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Enderborg <peter.enderborg@sony.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Vinayak Menon <vinmenon@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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685f7e4f16 |
powerpc updates for 4.20
Notable changes: - A large series to rewrite our SLB miss handling, replacing a lot of fairly complicated asm with much fewer lines of C. - Following on from that, we now maintain a cache of SLB entries for each process and preload them on context switch. Leading to a 27% speedup for our context switch benchmark on Power9. - Improvements to our handling of SLB multi-hit errors. We now print more debug information when they occur, and try to continue running by flushing the SLB and reloading, rather than treating them as fatal. - Enable THP migration on 64-bit Book3S machines (eg. Power7/8/9). - Add support for physical memory up to 2PB in the linear mapping on 64-bit Book3S. We only support up to 512TB as regular system memory, otherwise the percpu allocator runs out of vmalloc space. - Add stack protector support for 32 and 64-bit, with a per-task canary. - Add support for PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP. - Support recognising "big cores" on Power9, where two SMT4 cores are presented to us as a single SMT8 core. - A large series to cleanup some of our ioremap handling and PTE flags. - Add a driver for the PAPR SCM (storage class memory) interface, allowing guests to operate on SCM devices (acked by Dan). - Changes to our ftrace code to handle very large kernels, where we need to use a trampoline to get to ftrace_caller(). Many other smaller enhancements and cleanups. Thanks to: Alan Modra, Alistair Popple, Aneesh Kumar K.V, Anton Blanchard, Aravinda Prasad, Bartlomiej Zolnierkiewicz, Benjamin Herrenschmidt, Breno Leitao, Cédric Le Goater, Christophe Leroy, Christophe Lombard, Dan Carpenter, Daniel Axtens, Finn Thain, Gautham R. Shenoy, Gustavo Romero, Haren Myneni, Hari Bathini, Jia Hongtao, Joel Stanley, John Allen, Laurent Dufour, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Hairgrove, Masahiro Yamada, Michael Bringmann, Michael Neuling, Michal Suchanek, Murilo Opsfelder Araujo, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Paul Mackerras, Petr Vorel, Rashmica Gupta, Reza Arbab, Rob Herring, Sam Bobroff, Samuel Mendoza-Jonas, Scott Wood, Stan Johnson, Stephen Rothwell, Stewart Smith, Suraj Jitindar Singh, Tyrel Datwyler, Vaibhav Jain, Vasant Hegde, YueHaibing, zhong jiang, -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJb01vTAAoJEFHr6jzI4aWADsEP/jqL3+2qxs098ra80tpXCpXJ tgXCosEs4b35sGtyHeUWZZZfWXeisaPAIlP8zTx1n50HACZduDYRAl0Ew9XB7Xdw enDHRVccD21FsmHBOx/Ii1rVJlovWlj6EQCWHKeZmNjeRoFuClVZ7CYmf+mBifKR sw2Db2fKA/59wMTq2zIMy5pqYgqlAs4jTWS6uN5hKPoBmO/82ARnNG+qgLuloD3Z O8zSDM9QQ7PpuyDgTjO9SAo2YjmEfXlEG6cOCCejsU3DMctaEAK5PUZ+blsHYHBH BYZYKs/x4pcw0SO41GtTh0M2YqDYBVuBIpRw8lLZap97Xo9ucSkAm5WD3rGxk4CY YeZKEPUql6MHN3+DKl8mx2F0V+Et/tio2HNqc9KReR1tfoolZAbe+SFZHfgmc/Rq RD9nnG8KRd4K2K1BTqpkTmI1EtE7jPtPJPSV8gMGhgL/N5vPmH3mql/qyOtYx48E 6/hPzWESgs16VRZ/opLh8VvjlY1HBDODQhehhhl+o23/Vb8qEgRf8Uqhq50rQW1H EeOqyyYQ90txSU31Sgy1kQkvOgIFAsBObWT1ZCJ3RbfGbB4/tdEAvZqTZRlXo2OY 7P0Sqcw/9Le5eJkHIlLtBv0TF7y1OYemCbLgRQzFlcRP+UKtYyg8eFnFjqbPEEmP ulwhn/BfFVSgaYKQ503u =I0pj -----END PGP SIGNATURE----- Merge tag 'powerpc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Notable changes: - A large series to rewrite our SLB miss handling, replacing a lot of fairly complicated asm with much fewer lines of C. - Following on from that, we now maintain a cache of SLB entries for each process and preload them on context switch. Leading to a 27% speedup for our context switch benchmark on Power9. - Improvements to our handling of SLB multi-hit errors. We now print more debug information when they occur, and try to continue running by flushing the SLB and reloading, rather than treating them as fatal. - Enable THP migration on 64-bit Book3S machines (eg. Power7/8/9). - Add support for physical memory up to 2PB in the linear mapping on 64-bit Book3S. We only support up to 512TB as regular system memory, otherwise the percpu allocator runs out of vmalloc space. - Add stack protector support for 32 and 64-bit, with a per-task canary. - Add support for PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP. - Support recognising "big cores" on Power9, where two SMT4 cores are presented to us as a single SMT8 core. - A large series to cleanup some of our ioremap handling and PTE flags. - Add a driver for the PAPR SCM (storage class memory) interface, allowing guests to operate on SCM devices (acked by Dan). - Changes to our ftrace code to handle very large kernels, where we need to use a trampoline to get to ftrace_caller(). And many other smaller enhancements and cleanups. Thanks to: Alan Modra, Alistair Popple, Aneesh Kumar K.V, Anton Blanchard, Aravinda Prasad, Bartlomiej Zolnierkiewicz, Benjamin Herrenschmidt, Breno Leitao, Cédric Le Goater, Christophe Leroy, Christophe Lombard, Dan Carpenter, Daniel Axtens, Finn Thain, Gautham R. Shenoy, Gustavo Romero, Haren Myneni, Hari Bathini, Jia Hongtao, Joel Stanley, John Allen, Laurent Dufour, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Hairgrove, Masahiro Yamada, Michael Bringmann, Michael Neuling, Michal Suchanek, Murilo Opsfelder Araujo, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Paul Mackerras, Petr Vorel, Rashmica Gupta, Reza Arbab, Rob Herring, Sam Bobroff, Samuel Mendoza-Jonas, Scott Wood, Stan Johnson, Stephen Rothwell, Stewart Smith, Suraj Jitindar Singh, Tyrel Datwyler, Vaibhav Jain, Vasant Hegde, YueHaibing, zhong jiang" * tag 'powerpc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (221 commits) Revert "selftests/powerpc: Fix out-of-tree build errors" powerpc/msi: Fix compile error on mpc83xx powerpc: Fix stack protector crashes on CPU hotplug powerpc/traps: restore recoverability of machine_check interrupts powerpc/64/module: REL32 relocation range check powerpc/64s/radix: Fix radix__flush_tlb_collapsed_pmd double flushing pmd selftests/powerpc: Add a test of wild bctr powerpc/mm: Fix page table dump to work on Radix powerpc/mm/radix: Display if mappings are exec or not powerpc/mm/radix: Simplify split mapping logic powerpc/mm/radix: Remove the retry in the split mapping logic powerpc/mm/radix: Fix small page at boundary when splitting powerpc/mm/radix: Fix overuse of small pages in splitting logic powerpc/mm/radix: Fix off-by-one in split mapping logic powerpc/ftrace: Handle large kernel configs powerpc/mm: Fix WARN_ON with THP NUMA migration selftests/powerpc: Fix out-of-tree build errors powerpc/time: no steal_time when CONFIG_PPC_SPLPAR is not selected powerpc/time: Only set CONFIG_ARCH_HAS_SCALED_CPUTIME on PPC64 powerpc/time: isolate scaled cputime accounting in dedicated functions. ... |
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Linus Torvalds
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d1f2b1710d |
IOMMU Updates for Linux v4.20
These updates bring: - Debugfs support for the Intel VT-d driver. When enabled, it now also exposes some of its internal data structures to user-space for debugging purposes. - ARM-SMMU driver now uses the generic deferred flushing and fast-path iova allocation code. This is expected to be a major performance improvement, as this allocation path scales a lot better. - Support for r8a7744 in the Renesas iommu driver - Couple of minor fixes and improvements all over the place -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJb0vixAAoJECvwRC2XARrj0lkQALur432cGae8225gLNG+Ab1B lDGz/8uJeV4V552r58msq/yFpVascoMYOCgS+5N5J/jn5UiPnWxk//Uz2lvvCsFn 3Z4HswSbmNLSuEHmN3/1CK28An44LjYxtnH/zAEaHRJgWNmC05lO4glPXaSIBwVS ve6ULymHJittCHFNNAstNBvMYirYV2y+FYxoq6EteTuCruNNXR78KQV7TqPYI+uZ 0DwaXUyxO+HZbVeLpOnj/WHZ6+EUY0cHwHuk8U6ZCHnINZ+k9knt+WUvYu7wPCtj jGIyJXW5BG0rjJZnVUQs9BFXFSJLV2Ap8M3zKVIyFAUAyStEtGHct0YMRC29GX/J e45GPbElAZqx1NWRGGTV0xTsH5Gn85S2nP3p7iiPhj5zUhX/6SreZBDQdC+brtsB 8HG85xohsUkVmRq/ez4hu0yqXtB66ppV7TcOjyixybG+ixRPtUwTbiaYUxbvkZTr hcYUVLGcpJX463VjUKGoRPFL/jZ6BXUWdLVllZPYgDT+IBXtQx1TB20DDtj5V2mR 3m7B0xLQJDWdarhdA9Oj0FQj7ivmwmitcJ9EoNvHSRdEoE1iIy1vHv/7v/GokRVS J1YT5ZYAsGHBgZIsL7FpVA37i9t3JPVvgakUV/ZfLDyG3v+P0+eS3gNhECYt5luS D8G7Jy+2vsitO/ZCyu/r =q1HJ -----END PGP SIGNATURE----- Merge tag 'iommu-updates-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU updates from Joerg Roedel: - Debugfs support for the Intel VT-d driver. When enabled, it now also exposes some of its internal data structures to user-space for debugging purposes. - ARM-SMMU driver now uses the generic deferred flushing and fast-path iova allocation code. This is expected to be a major performance improvement, as this allocation path scales a lot better. - Support for r8a7744 in the Renesas iommu driver - Couple of minor fixes and improvements all over the place * tag 'iommu-updates-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (39 commits) iommu/arm-smmu-v3: Remove unnecessary wrapper function iommu/arm-smmu-v3: Add SPDX header iommu/amd: Add default branch in amd_iommu_capable() dt-bindings: iommu: ipmmu-vmsa: Add r8a7744 support iommu/amd: Move iommu_init_pci() to .init section iommu/arm-smmu: Support non-strict mode iommu/io-pgtable-arm-v7s: Add support for non-strict mode iommu/arm-smmu-v3: Add support for non-strict mode iommu/io-pgtable-arm: Add support for non-strict mode iommu: Add "iommu.strict" command line option iommu/dma: Add support for non-strict mode iommu/arm-smmu: Ensure that page-table updates are visible before TLBI iommu/arm-smmu-v3: Implement flush_iotlb_all hook iommu/arm-smmu-v3: Avoid back-to-back CMD_SYNC operations iommu/arm-smmu-v3: Fix unexpected CMD_SYNC timeout iommu/io-pgtable-arm: Fix race handling in split_blk_unmap() iommu/arm-smmu-v3: Fix a couple of minor comment typos iommu: Fix a typo iommu: Remove .domain_{get,set}_windows iommu: Tidy up window attributes ... |
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Linus Torvalds
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18d0eae30e |
Char/Misc driver patches for 4.20-rc1
Here is the big set of char/misc patches for 4.20-rc1. Loads of things here, we have new code in all of these driver subsystems: fpga stm extcon nvmem eeprom hyper-v gsmi coresight thunderbolt vmw_balloon goldfish soundwire along with lots of fixes and minor changes to other small drivers. All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW9Le5A8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+yn+BQCfZ6DtCIgqo0UW3dLV8Fd0wya9kw0AoNglzJJ6 YRZiaSdRiggARpNdh3ME =97BX -----END PGP SIGNATURE----- Merge tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here is the big set of char/misc patches for 4.20-rc1. Loads of things here, we have new code in all of these driver subsystems: - fpga - stm - extcon - nvmem - eeprom - hyper-v - gsmi - coresight - thunderbolt - vmw_balloon - goldfish - soundwire along with lots of fixes and minor changes to other small drivers. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (245 commits) Documentation/security-bugs: Clarify treatment of embargoed information lib: Fix ia64 bootloader linkage MAINTAINERS: Clarify UIO vs UIOVEC maintainer docs/uio: fix a grammar nitpick docs: fpga: document programming fpgas using regions fpga: add devm_fpga_region_create fpga: bridge: add devm_fpga_bridge_create fpga: mgr: add devm_fpga_mgr_create hv_balloon: Replace spin_is_locked() with lockdep sgi-xp: Replace spin_is_locked() with lockdep eeprom: New ee1004 driver for DDR4 memory eeprom: at25: remove unneeded 'at25_remove' w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size). misc: mic: scif: remove set but not used variables 'src_dma_addr, dst_dma_addr' misc: mic: fix a DMA pool free failure platform: goldfish: pipe: Add a blank line to separate varibles and code platform: goldfish: pipe: Remove redundant casting platform: goldfish: pipe: Call misc_deregister if init fails platform: goldfish: pipe: Move the file-scope goldfish_pipe_dev variable into the driver state platform: goldfish: pipe: Move the file-scope goldfish_pipe_miscdev variable into the driver state ... |
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Linus Torvalds
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9703fc8caf |
USB/PHY patches for 4.20-rc1
Here is the big USB/PHY driver patches for 4.20-rc1 Lots of USB changes in here, primarily in these areas: - typec updates and new drivers - new PHY drivers - dwc2 driver updates and additions (this old core keeps getting added to new devices.) - usbtmc major update based on the industry group coming together and working to add new features and performance to the driver. - USB gadget additions for new features - USB gadget configfs updates - chipidea driver updates - other USB gadget updates - USB serial driver updates - renesas driver updates - xhci driver updates - other tiny USB driver updates All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW9LlHw8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ymnvwCffYmMWyMG9zSOw1oSzFPl7TVN1hYAoMyJqzLg umyLwWxC9ZWWkrpc3iD8 =ux+Y -----END PGP SIGNATURE----- Merge tag 'usb-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB/PHY updates from Greg KH: "Here is the big USB/PHY driver patches for 4.20-rc1 Lots of USB changes in here, primarily in these areas: - typec updates and new drivers - new PHY drivers - dwc2 driver updates and additions (this old core keeps getting added to new devices.) - usbtmc major update based on the industry group coming together and working to add new features and performance to the driver. - USB gadget additions for new features - USB gadget configfs updates - chipidea driver updates - other USB gadget updates - USB serial driver updates - renesas driver updates - xhci driver updates - other tiny USB driver updates All of these have been in linux-next for a while with no reported issues" * tag 'usb-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (229 commits) usb: phy: ab8500: silence some uninitialized variable warnings usb: xhci: tegra: Add genpd support usb: xhci: tegra: Power-off power-domains on removal usbip:vudc: BUG kmalloc-2048 (Not tainted): Poison overwritten usbip: tools: fix atoi() on non-null terminated string USB: misc: appledisplay: fix backlight update_status return code phy: phy-pxa-usb: add a new driver usb: host: add DT bindings for faraday fotg2 usb: host: ohci-at91: fix request of irq for optional gpio usb/early: remove set but not used variable 'remain_length' usb: typec: Fix copy/paste on typec_set_vconn_role() kerneldoc usb: typec: tcpm: Report back negotiated PPS voltage and current USB: core: remove set but not used variable 'udev' usb: core: fix memory leak on port_dev_path allocation USB: net2280: Remove ->disconnect() callback from net2280_pullup() usb: dwc2: disable power_down on rockchip devices usb: gadget: udc: renesas_usb3: add support for r8a77990 dt-bindings: usb: renesas_usb3: add bindings for r8a77990 usb: gadget: udc: renesas_usb3: Add r8a774a1 support USB: serial: cypress_m8: remove set but not used variable 'iflag' ... |
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Linus Torvalds
|
01aa9d518e |
This is a fairly typical cycle for documentation. There's some welcome
readability improvements for the formatted output, some LICENSES updates including the addition of the ISC license, the removal of the unloved and unmaintained 00-INDEX files, the deprecated APIs document from Kees, more MM docs from Mike Rapoport, and the usual pile of typo fixes and corrections. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJbztcuAAoJEI3ONVYwIuV6nTAP/0Be+5dNPGJmSnb/RbkwBuBV zAFVUj2sx4lZlRmWRZ0r7AOef2eSw3IvwBix/vnmllYCVahjp+BdRbhXQAijjyeb FWWjOH50/J+BaxSthAINiLRLvuoe0D/M08OpmXQfRl5q0S8RufeV3BDtEABx9j2n IICPGTl8LpPUgSMA4cw8zPhHdauhZpbmL2mGE9LXZ27SJT4S8lcHMwyPU1n5S+Jd ChEz5g9dYr3GNxFp712pkI5GcVL3tP2nfoVwK7EuGf1tvSnEnn2kzac8QgMqorIh xB2+Sh4XIUCbHYpGHpxIniD+WI4voNr/E7STQioJK5o2G4HTuxLjktvTezNF8paa hgNHWjPQBq0OOCdM/rsffONFF2J/v/r7E3B+kaRg8pE0uZWTFaDMs6MVaL2fL4Ls DrFhi90NJI/Fs7uB4sriiviShAhwboiSIRXJi4VlY/5oFJKHFgqes+R7miU+zTX3 2qv0k4mWZXWDV9w1piPxSCZSdRzaoYSoxEihX+tnYpCyEcYd9ovW/X1Uhl/wCWPl Ft+Op6rkHXRXVfZzTLuF6PspZ4Udpw2PUcnA5zj5FRDDBsjSMFR31c19IFbCeiNY kbTIcqejJG1WbVrAK4LCcFyVSGxbrr281eth4rE06cYmmsz3kJy1DB6Lhyg/2vI0 I8K9ZJ99n1RhPJIcburB =C0wt -----END PGP SIGNATURE----- Merge tag 'docs-4.20' of git://git.lwn.net/linux Pull documentation updates from Jonathan Corbet: "This is a fairly typical cycle for documentation. There's some welcome readability improvements for the formatted output, some LICENSES updates including the addition of the ISC license, the removal of the unloved and unmaintained 00-INDEX files, the deprecated APIs document from Kees, more MM docs from Mike Rapoport, and the usual pile of typo fixes and corrections" * tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits) docs: Fix typos in histogram.rst docs: Introduce deprecated APIs list kernel-doc: fix declaration type determination doc: fix a typo in adding-syscalls.rst docs/admin-guide: memory-hotplug: remove table of contents doc: printk-formats: Remove bogus kobject references for device nodes Documentation: preempt-locking: Use better example dm flakey: Document "error_writes" feature docs/completion.txt: Fix a couple of punctuation nits LICENSES: Add ISC license text LICENSES: Add note to CDDL-1.0 license that it should not be used docs/core-api: memory-hotplug: add some details about locking internals docs/core-api: rename memory-hotplug-notifier to memory-hotplug docs: improve readability for people with poorer eyesight yama: clarify ptrace_scope=2 in Yama documentation docs/vm: split memory hotplug notifier description to Documentation/core-api docs: move memory hotplug description into admin-guide/mm doc: Fix acronym "FEKEK" in ecryptfs docs: fix some broken documentation references iommu: Fix passthrough option documentation ... |
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Linus Torvalds
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5993692f09 |
Further restructure ext4 documentation; fix up ext4's delayed
allocation for bigalloc file systems; fix up some syzbot-detected races in EXT4_IOC_MOVE_EXT, EXT4_IOC_SWAP_BOOT, and ext4_remount; and a few other miscellaneous bugs and optimizations. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEK2m5VNv+CHkogTfJ8vlZVpUNgaMFAlvQYEcACgkQ8vlZVpUN gaOPYAgAh0BF7mTRnHAp/qkR5ZhDi3ecb3TpNlnpfzoDqQhPYETFisc18DD4HwTj wctwzSdYxYodeuPIK+R2bBzUy3FuSwtlER9cdr1ilcrUYPZHbir1rPPfTNb/oDGx WNcd/aulLjuU1eKDODowqMOF2HDchiJHqJqMBa+LfCHck1x/bt2uqdjNA5A1p5AV lp07DoXT54q5rWJDaXpbxTShWKhzHlRKbB9PKEvMHgPNl9sn5oRReRMKAW+WkT91 e3mfy/GhzhugdWxYUg2oAn3dbqYkkAjW96WnBhCQHioW9ASphjl7yBi1LWh2aPA4 haGxe5W3En8q678ZVtTVNJOyvbW81Q== =VgdS -----END PGP SIGNATURE----- Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: - further restructure ext4 documentation - fix up ext4's delayed allocation for bigalloc file systems - fix up some syzbot-detected races in EXT4_IOC_MOVE_EXT, EXT4_IOC_SWAP_BOOT, and ext4_remount - ... and a few other miscellaneous bugs and optimizations. * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (21 commits) ext4: fix use-after-free race in ext4_remount()'s error path ext4: cache NULL when both default_acl and acl are NULL docs: promote the ext4 data structures book to top level docs: move ext4 administrative docs to admin-guide/ jbd2: fix use after free in jbd2_log_do_checkpoint() ext4: propagate error from dquot_initialize() in EXT4_IOC_FSSETXATTR ext4: fix setattr project check in fssetxattr ioctl docs: make ext4 readme tables readable docs: fix ext4 documentation table formatting problems docs: generate a separate ext4 pdf file from the documentation ext4: convert fault handler to use vm_fault_t type ext4: initialize retries variable in ext4_da_write_inline_data_begin() ext4: fix EXT4_IOC_SWAP_BOOT ext4: fix build error when DX_DEBUG is defined ext4: fix argument checking in EXT4_IOC_MOVE_EXT ext4: fix reserved cluster accounting at page invalidation time ext4: adjust reserved cluster count when removing extents ext4: reduce reserved cluster count by number of allocated clusters ext4: fix reserved cluster accounting at delayed write time ext4: add new pending reservation mechanism ... |
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Linus Torvalds
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638820d8da |
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris: "In this patchset, there are a couple of minor updates, as well as some reworking of the LSM initialization code from Kees Cook (these prepare the way for ordered stackable LSMs, but are a valuable cleanup on their own)" * 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: LSM: Don't ignore initialization failures LSM: Provide init debugging infrastructure LSM: Record LSM name in struct lsm_info LSM: Convert security_initcall() into DEFINE_LSM() vmlinux.lds.h: Move LSM_TABLE into INIT_DATA LSM: Convert from initcall to struct lsm_info LSM: Remove initcall tracing LSM: Rename .security_initcall section to .lsm_info vmlinux.lds.h: Avoid copy/paste of security_init section LSM: Correctly announce start of LSM initialization security: fix LSM description location keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h seccomp: remove unnecessary unlikely() security: tomoyo: Fix obsolete function security/capabilities: remove check for -EINVAL |
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Linus Torvalds
|
f682a7920b |
Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 paravirt updates from Ingo Molnar: "Two main changes: - Remove no longer used parts of the paravirt infrastructure and put large quantities of paravirt ops under a new config option PARAVIRT_XXL=y, which is selected by XEN_PV only. (Joergen Gross) - Enable PV spinlocks on Hyperv (Yi Sun)" * 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/hyperv: Enable PV qspinlock for Hyper-V x86/hyperv: Add GUEST_IDLE_MSR support x86/paravirt: Clean up native_patch() x86/paravirt: Prevent redefinition of SAVE_FLAGS macro x86/xen: Make xen_reservation_lock static x86/paravirt: Remove unneeded mmu related paravirt ops bits x86/paravirt: Move the Xen-only pv_mmu_ops under the PARAVIRT_XXL umbrella x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella x86/paravirt: Move items in pv_info under PARAVIRT_XXL umbrella x86/paravirt: Introduce new config option PARAVIRT_XXL x86/paravirt: Remove unused paravirt bits x86/paravirt: Use a single ops structure x86/paravirt: Remove clobbers from struct paravirt_patch_site x86/paravirt: Remove clobbers parameter from paravirt patch functions x86/paravirt: Make paravirt_patch_call() and paravirt_patch_jmp() static x86/xen: Add SPDX identifier in arch/x86/xen files x86/xen: Link platform-pci-unplug.o only if CONFIG_XEN_PVHVM x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella |
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Will Deacon
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14fdc2c531 |
Documentation/security-bugs: Clarify treatment of embargoed information
The Linux kernel security team has been accused of rejecting the idea of security embargoes. This is incorrect, and could dissuade people from reporting security issues to us under the false assumption that the issue would leak prematurely. Clarify the handling of embargoed information in our process documentation. Co-developed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linus Torvalds
|
c05f3642f4 |
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar: "The main updates in this cycle were: - Lots of perf tooling changes too voluminous to list (big perf trace and perf stat improvements, lots of libtraceevent reorganization, etc.), so I'll list the authors and refer to the changelog for details: Benjamin Peterson, Jérémie Galarneau, Kim Phillips, Peter Zijlstra, Ravi Bangoria, Sangwon Hong, Sean V Kelley, Steven Rostedt, Thomas Gleixner, Ding Xiang, Eduardo Habkost, Thomas Richter, Andi Kleen, Sanskriti Sharma, Adrian Hunter, Tzvetomir Stoyanov, Arnaldo Carvalho de Melo, Jiri Olsa. ... with the bulk of the changes written by Jiri Olsa, Tzvetomir Stoyanov and Arnaldo Carvalho de Melo. - Continued intel_rdt work with a focus on playing well with perf events. This also imported some non-perf RDT work due to dependencies. (Reinette Chatre) - Implement counter freezing for Arch Perfmon v4 (Skylake and newer). This allows to speed up the PMI handler by avoiding unnecessary MSR writes and make it more accurate. (Andi Kleen) - kprobes cleanups and simplification (Masami Hiramatsu) - Intel Goldmont PMU updates (Kan Liang) - ... plus misc other fixes and updates" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (155 commits) kprobes/x86: Use preempt_enable() in optimized_callback() x86/intel_rdt: Prevent pseudo-locking from using stale pointers kprobes, x86/ptrace.h: Make regs_get_kernel_stack_nth() not fault on bad stack perf/x86/intel: Export mem events only if there's PEBS support x86/cpu: Drop pointless static qualifier in punit_dev_state_show() x86/intel_rdt: Fix initial allocation to consider CDP x86/intel_rdt: CBM overlap should also check for overlap with CDP peer x86/intel_rdt: Introduce utility to obtain CDP peer tools lib traceevent, perf tools: Move struct tep_handler definition in a local header file tools lib traceevent: Separate out tep_strerror() for strerror_r() issues perf python: More portable way to make CFLAGS work with clang perf python: Make clang_has_option() work on Python 3 perf tools: Free temporary 'sys' string in read_event_files() perf tools: Avoid double free in read_event_file() perf tools: Free 'printk' string in parse_ftrace_printk() perf tools: Cleanup trace-event-info 'tdata' leak perf strbuf: Match va_{add,copy} with va_end perf test: S390 does not support watchpoints in test 22 perf auxtrace: Include missing asm/bitsperlong.h to get BITS_PER_LONG tools include: Adopt linux/bits.h ... |
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Linus Torvalds
|
cee1352f79 |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: "The biggest change in this cycle is the conclusion of the big 'simplify RCU to two primary flavors' consolidation work - i.e. there's a single RCU flavor for any kernel variant (PREEMPT and !PREEMPT): - Consolidate the RCU-bh, RCU-preempt, and RCU-sched flavors into a single flavor similar to RCU-sched in !PREEMPT kernels and into a single flavor similar to RCU-preempt (but also waiting on preempt-disabled sequences of code) in PREEMPT kernels. This branch also includes a refactoring of rcu_{nmi,irq}_{enter,exit}() from Byungchul Park. - Now that there is only one RCU flavor in any given running kernel, the many "rsp" pointers are no longer required, and this cleanup series removes them. - This branch carries out additional cleanups made possible by the RCU flavor consolidation, including inlining now-trivial functions, updating comments and definitions, and removing now-unneeded rcutorture scenarios. - Now that there is only one flavor of RCU in any running kernel, there is also only on rcu_data structure per CPU. This means that the rcu_dynticks structure can be merged into the rcu_data structure, a task taken on by this branch. This branch also contains a -rt-related fix from Mike Galbraith. There were also other updates: - Documentation updates, including some good-eye catches from Joel Fernandes. - SRCU updates, most notably changes enabling call_srcu() to be invoked very early in the boot sequence. - Torture-test updates, including some preliminary work towards making rcutorture better able to find problems that result in insufficient grace-period forward progress. - Initial changes to RCU to better promote forward progress of grace periods, including fixing a bug found by Marius Hillenbrand and David Woodhouse, with the fix suggested by Peter Zijlstra" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (140 commits) srcu: Make early-boot call_srcu() reuse workqueue lists rcutorture: Test early boot call_srcu() srcu: Make call_srcu() available during very early boot rcu: Convert rcu_state.ofl_lock to raw_spinlock_t rcu: Remove obsolete ->dynticks_fqs and ->cond_resched_completed rcu: Switch ->dynticks to rcu_data structure, remove rcu_dynticks rcu: Switch dyntick nesting counters to rcu_data structure rcu: Switch urgent quiescent-state requests to rcu_data structure rcu: Switch lazy counts to rcu_data structure rcu: Switch last accelerate/advance to rcu_data structure rcu: Switch ->tick_nohz_enabled_snap to rcu_data structure rcu: Merge rcu_dynticks structure into rcu_data structure rcu: Remove unused rcu_dynticks_snap() from Tiny RCU rcu: Convert "1UL << x" to "BIT(x)" rcu: Avoid resched_cpu() when rescheduling the current CPU rcu: More aggressively enlist scheduler aid for nohz_full CPUs rcu: Compute jiffies_till_sched_qs from other kernel parameters rcu: Provide functions for determining if call_rcu() has been invoked rcu: Eliminate ->rcu_qs_ctr from the rcu_dynticks structure rcu: Motivate Tiny RCU forward progress ... |
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Linus Torvalds
|
12dd08fa95 |
Power management updates for 4.20-rc1
- Backport hibernation bug fixes from x86-64 to x86-32 and consolidate hibernation handling on x86 to allow 32-bit systems to work in all of the cases in which 64-bit ones work (Zhimin Gu, Chen Yu). - Fix hibernation documentation (Vladimir D. Seleznev). - Update the menu cpuidle governor to fix a couple of issues with it, make it more efficient in some cases and clean it up (Rafael Wysocki). - Rework the cpuidle polling state implementation to make it more efficient (Rafael Wysocki). - Clean up the cpuidle core somewhat (Fieah Lim). - Fix the cpufreq conservative governor to take policy limits into account properly in some cases (Rafael Wysocki). - Add support for retrieving guaranteed performance information to the ACPI CPPC library and make the intel_pstate driver use it to expose the CPU base frequency via sysfs on systems with the hardware-managed P-states (HWP) feature enabled (Srinivas Pandruvada). - Fix clang warning in the CPPC cpufreq driver (Nathan Chancellor). - Get rid of device_node.name printing from cpufreq (Rob Herring). - Remove unnecessary unlikely() from the cpufreq core (Igor Stoppa). - Add support for the r8a7744 SoC to the cpufreq-dt driver (Biju Das). - Update the dt-platdev cpufreq driver to allow RK3399 to have separate tunables per cluster (Dmitry Torokhov). - Fix the dma_alloc_coherent() usage in the tegra186 cpufreq driver (Christoph Hellwig). - Make the imx6q cpufreq driver read OCOTP through nvmem for imx6ul/imx6ull (Anson Huang). - Fix several bugs in the operating performance points (OPP) framework and make it more stable (Viresh Kumar, Dave Gerlach). - Update the devfreq subsystem to take changes in the APIs used by into account, fix some issues with it and make it stop print device_node.name directly (Bjorn Andersson, Enric Balletbo i Serra, Matthias Kaehlcke, Rob Herring, Vincent Donnefort, zhong jiang). - Prepare the generic power domains (genpd) framework for dealing with domains containing CPUs (Ulf Hansson). - Prevent sysfs attributes representing low-power S0 residency counters from being exposed if low-power S0 support is not indicated in ACPI FADT (Rajneesh Bhardwaj). - Get rid of custom CPU features macros for Intel CPUs from the intel_idle and RAPL drivers (Andy Shevchenko). - Update the tasks freezer to list tasks that refused to freeze and caused a system transition to a sleep state to be aborted (Todd Brandt). - Update the pm-graph set of tools to v5.2 (Todd Brandt). - Fix some issues in the cpupower utility (Anders Roxell, Prarit Bhargava). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJbyaznAAoJEILEb/54YlRxUkoP/iOroh5pMW7PDa1g8sG26bfN ICln5Tt9lv1Euk3QALc5r05kLjyObfoMoDwvH2oiM0TgwSw6G64tm/ansTsvbPpc DCk53d0/gSqv5B1dZxV6OUYoXP0Z5hD+nW+1dg6EiGr1h24kesdEXdSB09bfTUY3 N4zUurWDUD92havuV3PakI/d/aOdxlwt9drwxv/cx4/gSYS0q5KtB2/N8YdWrk8Q 1UNwZkQLO8I0URfp9bwvwG3VhgKn0SKpLHlajq9KzWDPRgCl32oB0tY+3fOHW9Q+ djgMRA7xlAzAcCCL0vYJnEja6uMenvx3hZa1m68ZWFr0C25LQ5V87IEyZ3znvJQu IlcY9jMbYkX8dZz1M8LZA+nOtyYM5GxvgylaQvHRn8fi0jzYJWfJbAKdyvEX94qz UWtY35ihXFVBkhJuSxDPzluhMwxtd5uux1zO09/KlpUg8nnhxRx5l7AF7k7YyRk9 TZ5dVa6kp8CdmBZK6E9FNHstfvECL64oc9Ig3CB/bRXYBm60hN9pLXO2abJKV7dU FUe4kmWUNus5QKOzfGuPKJokw34/vxBW2CVrOeRUNcuaRhlUwuboijeLPf23XLI/ fYDI4EiMxAZvcEZ5h0KKDS0MaLv4uy0LbAdrWx8Eg7pNeFUiovDgovYUF7HOmn6M BzesklDaXWUSPWxlnASg =WJgu -----END PGP SIGNATURE----- Merge tag 'pm-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "These make hibernation on 32-bit x86 systems work in all of the cases in which it works on 64-bit x86 ones, update the menu cpuidle governor and the "polling" state to make them more efficient, add more hardware support to cpufreq drivers and fix issues with some of them, fix a bug in the conservative cpufreq governor, fix the operating performance points (OPP) framework and make it more stable, update the devfreq subsystem to take changes in the APIs used by into account and clean up some things all over. Specifics: - Backport hibernation bug fixes from x86-64 to x86-32 and consolidate hibernation handling on x86 to allow 32-bit systems to work in all of the cases in which 64-bit ones work (Zhimin Gu, Chen Yu). - Fix hibernation documentation (Vladimir D. Seleznev). - Update the menu cpuidle governor to fix a couple of issues with it, make it more efficient in some cases and clean it up (Rafael Wysocki). - Rework the cpuidle polling state implementation to make it more efficient (Rafael Wysocki). - Clean up the cpuidle core somewhat (Fieah Lim). - Fix the cpufreq conservative governor to take policy limits into account properly in some cases (Rafael Wysocki). - Add support for retrieving guaranteed performance information to the ACPI CPPC library and make the intel_pstate driver use it to expose the CPU base frequency via sysfs on systems with the hardware-managed P-states (HWP) feature enabled (Srinivas Pandruvada). - Fix clang warning in the CPPC cpufreq driver (Nathan Chancellor). - Get rid of device_node.name printing from cpufreq (Rob Herring). - Remove unnecessary unlikely() from the cpufreq core (Igor Stoppa). - Add support for the r8a7744 SoC to the cpufreq-dt driver (Biju Das). - Update the dt-platdev cpufreq driver to allow RK3399 to have separate tunables per cluster (Dmitry Torokhov). - Fix the dma_alloc_coherent() usage in the tegra186 cpufreq driver (Christoph Hellwig). - Make the imx6q cpufreq driver read OCOTP through nvmem for imx6ul/imx6ull (Anson Huang). - Fix several bugs in the operating performance points (OPP) framework and make it more stable (Viresh Kumar, Dave Gerlach). - Update the devfreq subsystem to take changes in the APIs used by into account, fix some issues with it and make it stop print device_node.name directly (Bjorn Andersson, Enric Balletbo i Serra, Matthias Kaehlcke, Rob Herring, Vincent Donnefort, zhong jiang). - Prepare the generic power domains (genpd) framework for dealing with domains containing CPUs (Ulf Hansson). - Prevent sysfs attributes representing low-power S0 residency counters from being exposed if low-power S0 support is not indicated in ACPI FADT (Rajneesh Bhardwaj). - Get rid of custom CPU features macros for Intel CPUs from the intel_idle and RAPL drivers (Andy Shevchenko). - Update the tasks freezer to list tasks that refused to freeze and caused a system transition to a sleep state to be aborted (Todd Brandt). - Update the pm-graph set of tools to v5.2 (Todd Brandt). - Fix some issues in the cpupower utility (Anders Roxell, Prarit Bhargava)" * tag 'pm-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (73 commits) PM / Domains: Document flags for genpd PM / Domains: Deal with multiple states but no governor in genpd PM / Domains: Don't treat zero found compatible idle states as an error cpuidle: menu: Avoid computations when result will be discarded cpuidle: menu: Drop redundant comparison cpufreq: tegra186: don't pass GFP_DMA32 to dma_alloc_coherent() cpufreq: conservative: Take limits changes into account properly Documentation: intel_pstate: Add base_frequency information cpufreq: intel_pstate: Add base_frequency attribute ACPI / CPPC: Add support for guaranteed performance cpuidle: menu: Simplify checks related to the polling state PM / tools: sleepgraph and bootgraph: upgrade to v5.2 PM / tools: sleepgraph: first batch of v5.2 changes cpupower: Fix coredump on VMWare cpupower: Fix AMD Family 0x17 msr_pstate size cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull cpufreq: dt-platdev: allow RK3399 to have separate tunables per cluster cpuidle: poll_state: Revise loop termination condition cpuidle: menu: Move the latency_req == 0 special case check cpuidle: menu: Avoid computations for very close timers ... |
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Srinivas Pandruvada
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4b73d334c5 |
Documentation: intel_pstate: Add base_frequency information
Updated documentation to explain base_frequency attribute. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Mike Rapoport
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63625899c6 |
docs/admin-guide: memory-hotplug: remove table of contents
Remove "manual" table of contents and leave only the ReST tag so that Sphinx will take care of TOC generation. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Kees Cook
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9b8c7c1405 |
LSM: Provide init debugging infrastructure
Booting with "lsm.debug" will report future details on how LSM ordering decisions are being made. Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: John Johansen <john.johansen@canonical.com> Reviewed-by: James Morris <james.morris@microsoft.com> Signed-off-by: James Morris <james.morris@microsoft.com> |
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Yi Sun
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3a025de64b |
x86/hyperv: Enable PV qspinlock for Hyper-V
Implement the required wait and kick callbacks to support PV spinlocks in Hyper-V guests. [ tglx: Document the requirement for disabling interrupts in the wait() callback. Remove goto and unnecessary includes. Add prototype for hv_vcpu_is_preempted(). Adapted to pending paravirt changes. ] Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Michael Kelley (EOSG) <Michael.H.Kelley@microsoft.com> Cc: chao.p.peng@intel.com Cc: chao.gao@intel.com Cc: isaku.yamahata@intel.com Cc: tianyu.lan@microsoft.com Link: https://lkml.kernel.org/r/1538987374-51217-3-git-send-email-yi.y.sun@linux.intel.com |
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Yves-Alexis Perez
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31527da5d6 |
yama: clarify ptrace_scope=2 in Yama documentation
Current phrasing is ambiguous since it's unclear if attaching to a children through PTRACE_TRACEME requires CAP_SYS_PTRACE. Rephrase the sentence to make that clear. Signed-off-by: Yves-Alexis Perez <corsac@corsac.net> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Mike Rapoport
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98cee6742c |
docs/vm: split memory hotplug notifier description to Documentation/core-api
The memory hotplug notifier description is about kernel internals rather than admin/user visible API. Place it appropriately. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Mike Rapoport
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6bf53999a3 |
docs: move memory hotplug description into admin-guide/mm
The memory hotplug description in Documentation/memory-hotplug.txt is already formatted as ReST and can be easily added to admin-guide/mm section. While on it, slightly update formatting to make it consistent with the doc-guide. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Darrick J. Wong
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d309121592 |
docs: move ext4 administrative docs to admin-guide/
Move the ext4 mount option and other administrative stuff to the Linux administrator's guide. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
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Christophe Leroy
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d90fe2acd9 |
powerpc: Wire up memtest
Add call to early_memtest() so that kernel compiled with CONFIG_MEMTEST really perform memtest at startup when requested via 'memtest' boot parameter. Tested-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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Zeng Tao
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bd0e6c9614 |
usb: hub: try old enumeration scheme first for high speed devices
The new scheme is required just to support legacy low and full-speed devices. For high speed devices, it will slower the enumeration speed. So in this patch we try the "old" enumeration scheme first for high speed devices, and this is what Windows does since Windows 8. Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Reviewed-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Feng Tang
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d2266bbfa9 |
x86/earlyprintk: Add a force option for pciserial device
The "pciserial" earlyprintk variant helps much on many modern x86 platforms, but unfortunately there are still some platforms with PCI UART devices which have the wrong PCI class code. In that case, the current class code check does not allow for them to be used for logging. Add a sub-option "force" which overrides the class code check and thus the use of such device can be enforced. [ bp: massage formulations. ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Stuart R . Anderson" <stuart.r.anderson@intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: David Rientjes <rientjes@google.com> Cc: Feng Tang <feng.tang@intel.com> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H Peter Anvin <hpa@linux.intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thymo van Beers <thymovanbeers@gmail.com> Cc: alan@linux.intel.com Cc: linux-doc@vger.kernel.org Link: http://lkml.kernel.org/r/20181002164921.25833-1-feng.tang@intel.com |
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Ingo Molnar
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d0346559a7 |
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull v4.20 RCU changes from Paul E. McKenney: - Documentation updates, including some good-eye catches from Joel Fernandes. - SRCU updates, most notably changes enabling call_srcu() to be invoked very early in the boot sequence. - Torture-test updates, including some preliminary work towards making rcutorture better able to find problems that result in insufficient grace-period forward progress. - Consolidate the RCU-bh, RCU-preempt, and RCU-sched flavors into a single flavor similar to RCU-sched in !PREEMPT kernels and into a single flavor similar to RCU-preempt (but also waiting on preempt-disabled sequences of code) in PREEMPT kernels. This branch also includes a refactoring of rcu_{nmi,irq}_{enter,exit}() from Byungchul Park. - Now that there is only one RCU flavor in any given running kernel, the many "rsp" pointers are no longer required, and this cleanup series removes them. - This branch carries out additional cleanups made possible by the RCU flavor consolidation, including inlining how-trivial functions, updating comments and definitions, and removing now-unneeded rcutorture scenarios. - Initial changes to RCU to better promote forward progress of grace periods, including fixing a bug found by Marius Hillenbrand and David Woodhouse, with the fix suggested by Peter Zijlstra. - Now that there is only one flavor of RCU in any running kernel, there is also only on rcu_data structure per CPU. This means that the rcu_dynticks structure can be merged into the rcu_data structure, a task taken on by this branch. This branch also contains a -rt-related fix from Mike Galbraith. Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Andi Kleen
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af3bdb991a |
perf/x86/intel: Add a separate Arch Perfmon v4 PMI handler
Implements counter freezing for Arch Perfmon v4 (Skylake and newer). This allows to speed up the PMI handler by avoiding unnecessary MSR writes and make it more accurate. The Arch Perfmon v4 PMI handler is substantially different than the older PMI handler. Differences to the old handler: - It relies on counter freezing, which eliminates several MSR writes from the PMI handler and lowers the overhead significantly. It makes the PMI handler more accurate, as all counters get frozen atomically as soon as any counter overflows. So there is much less counting of the PMI handler itself. With the freezing we don't need to disable or enable counters or PEBS. Only BTS which does not support auto-freezing still needs to be explicitly managed. - The PMU acking is done at the end, not the beginning. This makes it possible to avoid manual enabling/disabling of the PMU, instead we just rely on the freezing/acking. - The APIC is acked before reenabling the PMU, which avoids problems with LBRs occasionally not getting unfreezed on Skylake. - Looping is only needed to workaround a corner case which several PMIs are very close to each other. For common cases, the counters are freezed during PMI handler. It doesn't need to do re-check. This patch: - Adds code to enable v4 counter freezing - Fork <=v3 and >=v4 PMI handlers into separate functions. - Add kernel parameter to disable counter freezing. It took some time to debug counter freezing, so in case there are new problems we added an option to turn it off. Would not expect this to be used until there are new bugs. - Only for big core. The patch for small core will be posted later separately. Performance: When profiling a kernel build on Kabylake with different perf options, measuring the length of all NMI handlers using the nmi handler trace point: V3 is without counter freezing. V4 is with counter freezing. The value is the average cost of the PMI handler. (lower is better) perf options ` V3(ns) V4(ns) delta -c 100000 1088 894 -18% -g -c 100000 1862 1646 -12% --call-graph lbr -c 100000 3649 3367 -8% --c.g. dwarf -c 100000 2248 1982 -12% Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: acme@kernel.org Link: http://lkml.kernel.org/r/1533712328-2834-2-git-send-email-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Joerg Roedel
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6f20a97e09 | Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu | ||
Jens Axboe
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c0aac682fa |
This is the 4.19-rc6 release
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAluw4MIACgkQONu9yGCS aT7+8xAAiYnc4khUsxeInm3z44WPfRX1+UF51frTNSY5C8Nn5nvRSnTUNLuKkkrz 8RbwCL6UYyJxF9I/oZdHPsPOD4IxXkQY55tBjz7ZbSBIFEwYM6RJMm8mAGlXY7wq VyWA5MhlpGHM9DjrguB4DMRipnrSc06CVAnC+ZyKLjzblzU1Wdf2dYu+AW9pUVXP j4r74lFED5djPY1xfqfzEwmYRCeEGYGx7zMqT3GrrF5uFPqj1H6O5klEsAhIZvdl IWnJTU2coC8R/Sd17g4lHWPIeQNnMUGIUbu+PhIrZ/lDwFxlocg4BvarPXEdzgYi gdZzKBfovpEsSu5RCQsKWG4IGQxY7I1p70IOP9eqEFHZy77qT1YcHVAWrK1Y/bJd UA08gUOSzRnhKkNR3+PsaMflUOl9WkpyHECZu394cyRGMutSS50aWkavJPJ/o1Qi D/oGqZLLcKFyuNcchG+Met1TzY3LvYEDgSburqwqeUZWtAsGs8kmiiq7qvmXx4zV IcgM8ERqJ8mbfhfsXQU7hwydIrPJ3JdIq19RnM5ajbv2Q4C/qJCyAKkQoacrlKR4 aiow/qvyNrP80rpXfPJB8/8PiWeDtAnnGhM+xySZNlw3t8GR6NYpUkIzf5TdkSb3 C8KuKg6FY9QAS62fv+5KK3LB/wbQanxaPNruQFGe5K1iDQ5Fvzw= =dMl4 -----END PGP SIGNATURE----- Merge tag 'v4.19-rc6' into for-4.20/block Merge -rc6 in, for two reasons: 1) Resolve a trivial conflict in the blk-mq-tag.c documentation 2) A few important regression fixes went into upstream directly, so they aren't in the 4.20 branch. Signed-off-by: Jens Axboe <axboe@kernel.dk> * tag 'v4.19-rc6': (780 commits) Linux 4.19-rc6 MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c cpufreq: qcom-kryo: Fix section annotations perf/core: Add sanity check to deal with pinned event failure xen/blkfront: correct purging of persistent grants Revert "xen/blkfront: When purging persistent grants, keep them in the buffer" selftests/powerpc: Fix Makefiles for headers_install change blk-mq: I/O and timer unplugs are inverted in blktrace dax: Fix deadlock in dax_lock_mapping_entry() x86/boot: Fix kexec booting failure in the SEV bit detection code bcache: add separate workqueue for journal_write to avoid deadlock drm/amd/display: Fix Edid emulation for linux drm/amd/display: Fix Vega10 lightup on S3 resume drm/amdgpu: Fix vce work queue was not cancelled when suspend Revert "drm/panel: Add device_link from panel device to DRM device" xen/blkfront: When purging persistent grants, keep them in the buffer clocksource/drivers/timer-atmel-pit: Properly handle error cases block: fix deadline elevator drain for zoned block devices ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set ... Signed-off-by: Jens Axboe <axboe@kernel.dk> |