Fenghua Yu a0195f314a x86/resctrl: Don't move a task to the same resource group ... Shakeel Butt reported in [1] that a user can request a task to be moved to a resource group even if the task is already in the group. It just wastes time to do the move operation which could be costly to send IPI to a different CPU. Add a sanity check to ensure that the move operation only happens when the task is not already in the resource group. [1] https://lore.kernel.org/lkml/CALvZod7E9zzHwenzf7objzGKsdBmVwTgEJ0nPgs0LUFU3SN5Pw@mail.gmail.com/ Fixes: e02737d5b8 ("x86/intel_rdt: Add tasks files") Reported-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/962ede65d8e95be793cb61102cca37f7bb018e66.1608243147.git.reinette.chatre@intel.com		2021-01-08 09:08:03 +01:00
..
boot	EFI updates collected by Ard Biesheuvel:	2020-12-24 12:40:07 -08:00
configs	* A defconfig fix, from Daniel Díaz.	2020-09-20 15:06:43 -07:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2020-12-14 12:18:19 -08:00
entry	epoll: wire up syscall epoll_pwait2	2020-12-19 11:18:38 -08:00
events	Perf updates:	2020-12-14 17:34:12 -08:00
hyperv	hyperv-fixes for 5.10-rc3	2020-11-05 11:32:03 -08:00
ia32	x86/ia32_signal: Propagate __user annotation properly	2020-12-11 19:44:31 +01:00
include	EFI updates collected by Ard Biesheuvel:	2020-12-24 12:40:07 -08:00
kernel	x86/resctrl: Don't move a task to the same resource group	2021-01-08 09:08:03 +01:00
kvm	ARM:	2020-12-20 10:44:05 -08:00
lib	Scheduler updates:	2020-12-14 18:29:11 -08:00
math-emu	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
mm	x86/mm: Fix leak of pmd ptlock	2021-01-05 11:40:23 +01:00
net	bpf: x64: Do not emit sub/add 0, %rsp when !stack_depth	2020-09-29 16:47:39 -07:00
oprofile	x86/oprofile: Avoid TIF_IA32 when checking 64bit mode	2020-10-26 13:46:46 +01:00
pci	ARM: SoC drivers for v5.11	2020-12-16 16:38:41 -08:00
platform	Yet another large set of x86 interrupt management updates:	2020-12-14 18:59:53 -08:00
power	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
purgatory	crypto: sha - split sha.h into sha1.h and sha2.h	2020-11-20 14:45:33 +11:00
ras	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
realmode	x86/head/64: Don't call verify_cpu() on starting APs	2020-09-09 11:33:20 +02:00
tools	x86/insn: Make inat-tables.c suitable for pre-decompression code	2020-09-07 19:45:24 +02:00
um	arch/um: partially revert the conversion to __section() macro	2020-10-26 15:39:37 -07:00
video
xen	EFI updates collected by Ard Biesheuvel:	2020-12-24 12:40:07 -08:00
.gitignore
Kbuild
Kconfig	fanotify: Fix sys_fanotify_mark() on native x86-32	2020-12-28 11:58:59 +01:00
Kconfig.assembler
Kconfig.cpu	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Kconfig.debug	x86, libnvdimm/test: Remove COPY_MC_TEST	2020-10-26 18:08:35 +01:00
Makefile	- Fix the vmlinux size check on 64-bit along with adding useful clarifications on the topic	2020-12-14 13:54:50 -08:00
Makefile_32.cpu
Makefile.um