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6727ad9e20
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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
..
basic scripts: Fix size mismatch of kexec_purgatory_size 2016-07-22 14:05:40 +02:00
coccinelle scripts/coccinelle: require coccinelle >= 1.0.4 on device_node_continue.cocci 2016-07-22 12:13:39 +02:00
dtc scripts/dtc: dt_to_config - kernel config options for a devicetree 2016-07-22 14:48:16 -05:00
gcc-plugins gcc-plugins: Add support for plugin subdirectories 2016-08-08 17:53:05 -07:00
gdb Revert "scripts/gdb: add a Radix Tree Parser" 2016-07-15 14:54:27 +09:00
genksyms scripts: genksyms: fix resource leak 2016-04-20 09:24:49 +02:00
kconfig Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-05-26 22:27:09 -07:00
ksymoops
mod nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
package builddeb: Skip gcc-plugins when not configured 2016-08-16 10:16:38 +02:00
selinux selinux: explicitly declare the role "base_r" 2015-07-13 13:32:00 -04:00
tracing ftrace/scripts: Add helper script to bisect function tracing problem functions 2016-09-21 13:56:55 -04:00
.gitignore KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
adjust_autoksyms.sh kbuild: fix adjust_autoksyms.sh for modules that need only one symbol 2016-05-10 17:25:29 +02:00
analyze_suspend.py PM / tools: scripts: AnalyzeSuspend v4.2 2016-07-15 23:34:14 +02:00
asn1_compiler.c ASN.1: fix open failure check on headername 2016-04-06 14:06:48 +01:00
bloat-o-meter scripts/bloat-o-meter: fix percent on <1% changes 2016-07-26 16:19:19 -07:00
bootgraph.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
check_extable.sh scripts: add check_extable.sh script. 2015-04-13 21:03:02 +09:30
check-lc_ctype.c DocBook: Use a fixed encoding for output 2015-09-28 01:31:48 -06:00
checkincludes.pl
checkkconfigsymbols.py checkkconfigsymbols: use arglist instead of cmd string 2016-08-28 11:08:34 +02:00
checkpatch.pl treewide: remove references to the now unnecessary DEFINE_PCI_DEVICE_TABLE 2016-09-01 17:52:01 -07:00
checkstack.pl Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-10-07 21:16:26 -04:00
checksyscalls.sh x86/asm/entry: Move the arch/x86/syscalls/ definitions to arch/x86/entry/syscalls/ 2015-06-04 07:37:37 +02:00
checkversion.pl
cleanfile
cleanpatch
coccicheck coccicheck: refer to Documentation/coccinelle.txt and wiki 2016-07-22 12:13:39 +02:00
config kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
conmakehash.c kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: handle symbols in modules 2016-05-19 19:12:14 -07:00
decodecode
depmod.sh
diffconfig vfs,ext2: remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX 2015-02-16 17:56:04 -08:00
docproc.c docproc: print a comment about autogeneration for rst output 2016-05-14 09:56:56 -06:00
export_report.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
extract_xc3028.pl [media] extract_xc3028.pl: move it to scripts/dir 2016-07-17 14:08:12 -03:00
extract-cert.c KEYS: Remove unnecessary header #inclusions from extract-cert.c 2015-09-25 16:31:45 +01:00
extract-ikconfig scripts/extract-ikconfig: Support LZ4-compressed images. 2015-04-15 14:01:12 +02:00
extract-module-sig.pl KEYS: Provide a script to extract a module signature 2015-10-21 15:18:36 +01:00
extract-sys-certs.pl KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert 2016-02-26 15:32:05 +00:00
extract-vmlinux
faddr2line scripts/faddr2line: improve on base path filtering a bit 2016-09-19 14:49:08 -07:00
gcc-goto.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-ld kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-plugin.sh gcc-plugins: abort builds cleanly when not supported 2016-08-08 17:49:05 -07:00
gcc-version.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_32-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_64-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gen_initramfs_list.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
get_dvb_firmware [media] doc-rst: move DVB avulse docs to Documentation/media 2016-07-17 14:02:45 -03:00
get_maintainer.pl get_maintainer: quiet noisy implicit -f vcs_file_exists checking 2016-08-26 17:39:34 -07:00
gfp-translate
headerdep.pl
headers_check.pl headers_check: don't warn about c++ guards 2016-05-24 14:12:48 +10:00
headers_install.sh Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-10-14 09:22:26 +02:00
headers.sh CRIS: Fix headers_install 2014-12-20 00:01:12 +01:00
insert-sys-cert.c KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
kallsyms.c ARM: 8553/1: kallsyms: remove --page-offset command line option 2016-04-07 21:57:16 +01:00
Kbuild.include kbuild: no gcc-plugins during cc-option tests 2016-08-08 17:49:05 -07:00
kernel-doc docs: Special-case function-pointer parameters in kernel-doc 2016-09-06 08:02:49 -06:00
kernel-doc-xml-ref scripts/kernel-doc: Adding cross-reference links to html documentation. 2015-08-16 22:11:16 -06:00
ld-version.sh ld-version: Drop the 4th and 5th version components 2016-05-13 14:02:05 +02:00
Lindent scripts/Lindent: handle missing indent gracefully 2015-09-04 16:54:41 -07:00
link-vmlinux.sh GCC plugin infrastructure 2016-06-07 22:57:10 +02:00
Makefile GCC plugin infrastructure 2016-06-07 22:57:10 +02:00
Makefile.asm-generic kbuild: Remove stale asm-generic wrappers 2016-07-07 15:58:45 +02:00
Makefile.build Shared library support 2016-06-07 22:57:10 +02:00
Makefile.clean Shared library support 2016-06-07 22:57:10 +02:00
Makefile.dtbinst dtbsinstall: don't move target directory out of the way 2016-01-28 11:40:32 +01:00
Makefile.extrawarn kbuild: move -Wunused-const-variable to W=1 warning level 2016-05-11 13:05:40 +02:00
Makefile.fwinst kbuild: include $(src)/Makefile rather than $(obj)/Makefile 2015-04-02 16:42:08 +02:00
Makefile.gcc-plugins gcc-plugins: Add support for plugin subdirectories 2016-08-08 17:53:05 -07:00
Makefile.headersinst kbuild: collect shorthands into scripts/Kbuild.include 2014-11-26 14:36:52 +01:00
Makefile.help
Makefile.host Shared library support 2016-06-07 22:57:10 +02:00
Makefile.kasan arm64: add KASAN support 2015-10-12 17:46:36 +01:00
Makefile.lib Merge branch 'akpm' (patches from Andrew) 2016-08-02 21:08:07 -04:00
Makefile.modbuiltin
Makefile.modinst modsign: Abort modules_install when signing fails 2015-08-07 16:26:13 +01:00
Makefile.modpost modpost: Add flag -E for making section mismatches fatal 2015-10-06 10:46:21 +10:30
Makefile.modsign modsign: lookup lines ending in .ko in .mod files 2014-08-27 21:54:11 +09:30
Makefile.ubsan ubsan: allow to disable the null sanitizer 2016-09-20 14:26:08 +02:00
makelst
markup_oops.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mkcompile_h kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
mkmakefile kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mksysmap mksysmap: Add h8300 local symbol pattern 2015-06-23 13:35:47 +09:00
mkuboot.sh
mkversion
module-common.lds kernel: add support for .init_array.* constructors 2015-02-13 21:21:42 -08:00
namespace.pl kallsyms: add support for relative offsets in kallsyms address table 2016-03-15 16:55:16 -07:00
objdiff scripts: objdiff: support directories for the augument of record command 2014-06-10 14:59:33 +02:00
patch-kernel kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
pnmtologo.c kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
profile2linkerlist.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
prune-kernel scripts: add "prune-kernel" script to clean up old kernel images 2016-02-09 10:09:52 -08:00
recordmcount.c nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
recordmcount.h recordmcount: Fix endianness handling bug for nop_mcount 2015-11-03 10:45:26 -05:00
recordmcount.pl nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
setlocalversion kbuild: setlocalversion: print error to STDERR 2016-06-20 17:37:45 +02:00
show_delta kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
sign-file.c modsign: Make sign-file determine the format of the X.509 cert 2016-06-14 13:18:33 +01:00
sortextable.c parisc: Use generic extable search and sort routines 2016-03-23 16:00:46 +01:00
sortextable.h scripts/sortextable: suppress warning: `relocs_size' may be used uninitialized 2014-10-14 02:18:23 +02:00
spelling.txt scripts/spelling.txt: add "fimware" misspelling 2016-05-19 19:12:14 -07:00
stackdelta scripts: add stackdelta script 2015-08-28 17:04:40 +02:00
stackusage scripts: add stackusage script 2015-08-28 17:04:40 +02:00
tags.sh treewide: remove references to the now unnecessary DEFINE_PCI_DEVICE_TABLE 2016-09-01 17:52:01 -07:00
unifdef.c
ver_linux ver_linux: rename ver_linux.awk to ver_linux 2016-08-31 13:59:31 +02:00
xen-hypercalls.sh xen: build infrastructure for generating hypercall depending symbols 2015-03-16 14:49:13 +00:00
xz_wrap.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00