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linux-next/arch/ia64/kernel
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Chris Metcalf 6727ad9e20 nmi_backtrace: generate one-line reports for idle cpus 
When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative.  Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".

We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.

This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.

Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm]
Tested-by: Petr Mladek <pmladek@suse.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07 18:46:30 -07:00
..
.gitignore
acpi-ext.c ACPICA: Resources: Provide common part for struct acpi_resource_address structures. 2015-01-26 16:09:56 +01:00
acpi.c x86/acpi: Set persistent cpuid <-> nodeid mapping when booting 2016-09-21 21:18:39 +02:00
asm-offsets.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
audit.c [IA64] Remove COMPAT_IA32 support 2010-02-08 10:42:17 -08:00
brl_emu.c
crash_dump.c crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn 2011-03-23 19:47:19 -07:00
crash.c ia64: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:15 -07:00
cyclone.c arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
dma-mapping.c ia64: Add export.h to arch/ia64 specific files as required 2011-10-31 19:30:58 -04:00
efi_stub.S
efi.c ia64: efi: use timespec64 for persistent clock 2016-06-17 13:45:05 -07:00
elfcore.c switch elf_core_write_extra_data() to dump_emit() 2013-11-09 00:16:23 -05:00
entry.h
entry.S [IA64] Enable preadv2 and pwritev2 syscalls for ia64 2016-03-25 14:37:32 -07:00
err_inject.c mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm 2016-02-16 10:11:12 +01:00
esi_stub.S
esi.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
fsys.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
fsyscall_gtod_data.h ia64: vsyscall: Use seqcount instead of seqlock 2012-03-15 18:17:59 -07:00
ftrace.c ia64: ftrace: Fix the comments for ftrace_modify_code() 2015-12-23 14:27:23 -05:00
gate-data.S Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
gate.lds.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
gate.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
head.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
ia64_ksyms.c ia64: export flush_icache_range for module use 2015-06-15 14:58:24 -07:00
init_task.c fix up initial thread stack pointer vs thread_info confusion 2016-06-24 17:07:33 -07:00
iosapic.c ia64: rename nop->iosapic_nop 2016-01-12 20:46:47 +02:00
irq_ia64.c ia64: remove deprecated cpus_ usage. 2015-03-10 13:54:38 +10:30
irq_lsapic.c ia64: Convert lsapic to new irq_chip functions 2011-03-29 14:48:02 +02:00
irq.c ia64/irq: Use access helper irq_data_get_affinity_mask() 2015-07-27 13:36:37 +02:00
ivt.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
jprobes.S
kprobes.c ia64: Replace __get_cpu_var uses 2014-08-26 13:45:52 -04:00
machine_kexec.c kdump: arrange for paddr_vmcoreinfo_note() to return phys_addr_t 2016-08-02 19:35:27 -04:00
machvec.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
Makefile ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
Makefile.gate Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
mca_asm.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
mca_drv_asm.S
mca_drv.c Remove cast for kmalloc return value 2013-03-19 16:14:53 -07:00
mca_drv.h
mca.c Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 19:43:08 -07:00
minstate.h ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
msi_ia64.c ia64/irq: Use access helper irq_data_get_affinity_mask() 2015-07-27 13:36:37 +02:00
nr-irqs.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
numa.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
pal.S
palinfo.c ia64, palinfo: Fix CPU hotplug callback registration 2014-03-20 13:43:40 +01:00
patch.c ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
pci-dma.c [IA64] pci: Remove unused fallback_dev 2013-06-03 16:04:31 -07:00
pci-swiotlb.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
perfmon_default_smpl.c Fix common misspellings 2011-03-31 11:26:23 -03:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h
perfmon_montecito.h
perfmon.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
process.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
ptrace.c ARCH: AUDIT: audit_syscall_entry() should not require the arch 2014-09-23 16:21:26 -04:00
relocate_kernel.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
sal.c
salinfo.c ia64: salinfo: use a waitqueue instead a sema down/up combo 2016-07-25 09:55:32 -07:00
setup.c ACPI / NUMA: Move acpi_numa_arch_fixup() to ia64 only 2016-05-30 14:27:07 +02:00
sigframe.h
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
smp.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
smpboot.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c [IA64] Add CONFIG_STACKTRACE_SUPPORT 2010-09-23 13:52:07 -07:00
sys_ia64.c mm: use vm_unmapped_area() on ia64 architecture 2013-02-22 13:46:59 -08:00
time.c ia64: efi: use timespec64 for persistent clock 2016-06-17 13:45:05 -07:00
topology.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
traps.c ia64/traps: Silence GCC warning about uninitialised variable 2016-05-05 10:29:14 -07:00
unaligned.c ia64/unaligned: Silence another GCC warning about an uninitialised variable 2016-05-05 10:29:14 -07:00
uncached.c mm: rename alloc_pages_exact_node() to __alloc_pages_node() 2015-09-08 15:35:28 -07:00
unwind_decoder.c
unwind_i.h
unwind.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00