KAMEZAWA Hiroyuki 43d2b11324 tracepoint: add tracepoints for debugging oom_score_adj ... oom_score_adj is used for guarding processes from OOM-Killer. One of problem is that it's inherited at fork(). When a daemon set oom_score_adj and make children, it's hard to know where the value is set. This patch adds some tracepoints useful for debugging. This patch adds 3 trace points. - creating new task - renaming a task (exec) - set oom_score_adj To debug, users need to enable some trace pointer. Maybe filtering is useful as # EVENT=/sys/kernel/debug/tracing/events/task/ # echo "oom_score_adj != 0" > $EVENT/task_newtask/filter # echo "oom_score_adj != 0" > $EVENT/task_rename/filter # echo 1 > $EVENT/enable # EVENT=/sys/kernel/debug/tracing/events/oom/ # echo 1 > $EVENT/enable output will be like this. # grep oom /sys/kernel/debug/tracing/trace bash-7699 [007] d..3 5140.744510: oom_score_adj_update: pid=7699 comm=bash oom_score_adj=-1000 bash-7699 [007] ...1 5151.818022: task_newtask: pid=7729 comm=bash clone_flags=1200011 oom_score_adj=-1000 ls-7729 [003] ...2 5151.818504: task_rename: pid=7729 oldcomm=bash newcomm=ls oom_score_adj=-1000 bash-7699 [002] ...1 5175.701468: task_newtask: pid=7730 comm=bash clone_flags=1200011 oom_score_adj=-1000 grep-7730 [007] ...2 5175.701993: task_rename: pid=7730 oldcomm=bash newcomm=grep oom_score_adj=-1000 Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-01-10 16:30:44 -08:00
..
debug	kdb: Make KDB use the new is_idle_task() API	2011-12-11 10:31:52 -08:00
events	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
gcov	gcov: disable CONSTRUCTORS for UML	2011-07-26 16:49:45 -07:00
irq	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
power	PM/Hibernate: do not count debug pages as savable	2012-01-10 16:30:42 -08:00
sched	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
time	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-01-08 13:21:22 -08:00
trace	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	arch:Kconfig.locks Remove unused config option.	2011-04-10 17:01:05 +02:00
Kconfig.preempt	sched: Isolate preempt counting in its own config option	2011-06-10 15:15:40 +02:00
Makefile	sched: Move all scheduler bits into kernel/sched/	2011-11-17 12:20:22 +01:00
acct.c	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
async.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
audit.c	audit: always follow va_copy() with va_end()	2012-01-08 14:15:21 -08:00
audit.h	audit: make functions static	2010-10-30 01:42:19 -04:00
audit_tree.c	audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()	2011-07-20 14:10:11 -07:00
audit_watch.c	kill path_lookup()	2011-03-14 09:15:23 -04:00
auditfilter.c	netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms	2011-03-03 10:55:40 -08:00
auditsc.c	auditsc: propage umode_t	2012-01-03 22:55:17 -05:00
backtracetest.c	…
bounds.c	memcg: remove direct page_cgroup-to-page pointer	2011-03-23 19:46:28 -07:00
capability.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
cgroup.c	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
cgroup_freezer.c	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
compat.c	kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure	2011-10-31 19:30:05 -04:00
configs.c	kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n	2011-07-25 20:57:15 -07:00
cpu.c	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
cpu_pm.c	cpu_pm: call notifiers during suspend	2011-09-23 12:05:29 +05:30
cpuset.c	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
crash_dump.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
cred.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
delayacct.c	KVM: Steal time implementation	2011-07-14 12:59:14 +03:00
dma.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
elfcore.c	…
exec_domain.c	sys_personality: remove the bogus checks in sys_personality()->__set_personality() path	2010-08-09 20:45:05 -07:00
exit.c	Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm	2012-01-08 13:10:57 -08:00
extable.c	extable, core_kernel_data(): Make sure all archs define _sdata	2011-05-20 08:56:56 +02:00
fork.c	tracepoint: add tracepoints for debugging oom_score_adj	2012-01-10 16:30:44 -08:00
freezer.c	freezer: kill unused set_freezable_with_signal()	2011-11-23 09:28:17 -08:00
futex.c	futex: Fix uninterruptible loop due to gate_area	2011-12-31 11:48:28 -08:00
futex_compat.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
groups.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
hrtimer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2011-11-28 08:43:52 -08:00
hung_task.c	hung_task: fix false positive during vfork	2012-01-03 16:14:32 -08:00
irq_work.c	kernel: fix two implicit header assumptions in irq_work.c	2011-10-31 09:20:12 -04:00
itimer.c	[S390] cputime: add sparse checking and cleanup	2011-12-15 14:56:19 +01:00
jump_label.c	jump_label: Provide jump_label_key initializers	2011-12-06 20:41:03 +01:00
kallsyms.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-03-25 17:52:22 -07:00
kexec.c	PM / Sleep: Replace mutex_[un]lock(&pm_mutex) with [un]lock_system_sleep()	2011-12-08 23:22:29 +01:00
kfifo.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
kmod.c	Merge branch 'pm-sleep' into pm-for-linus	2011-12-25 23:42:20 +01:00
kprobes.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
ksysfs.c	kernel: ksysfs.c is implicitly using stat.h	2011-10-31 09:20:13 -04:00
kthread.c	freezer: kill unused set_freezable_with_signal()	2011-11-23 09:28:17 -08:00
latencytop.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
lockdep.c	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-01-06 08:02:58 -08:00
lockdep_internals.h	…
lockdep_proc.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
lockdep_states.h	…
module.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
mutex-debug.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
mutex-debug.h	mutex: Use p->on_cpu for the adaptive spin	2011-04-14 08:52:33 +02:00
mutex.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
mutex.h	mutex: Use p->on_cpu for the adaptive spin	2011-04-14 08:52:33 +02:00
notifier.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
nsproxy.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
padata.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
panic.c	lockdep, bug: Exclude TAINT_OOT_MODULE from disabling lock debugging	2011-12-07 23:32:10 +01:00
params.c	kernel: params.c needs module.h not moduleparam.h	2011-10-31 09:20:13 -04:00
pid.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
pid_namespace.c	pidns: call pid_ns_prepare_proc() from create_pid_namespace()	2011-03-23 19:46:58 -07:00
posix-cpu-timers.c	[S390] cputime: add sparse checking and cleanup	2011-12-15 14:56:19 +01:00
posix-timers.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
printk.c	Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-01-06 08:01:59 -08:00
profile.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
ptrace.c	ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach	2012-01-04 15:01:59 -08:00
range.c	range: fix bogus misuse of module.h to get printk()	2011-10-31 09:20:11 -04:00
rcu.h	rcu: Deconfuse dynticks entry-exit tracing	2011-12-11 10:31:42 -08:00
rcupdate.c	rcu: Detect illegal rcu dereference in extended quiescent state	2011-12-11 10:31:30 -08:00
rcutiny.c	rcu: Augment rcu_batch_end tracing for idle and callback state	2011-12-11 10:32:22 -08:00
rcutiny_plugin.h	rcu: Apply ACCESS_ONCE() to rcu_boost() return value	2011-12-11 10:33:19 -08:00
rcutorture.c	rcu: Add rcutorture tests for srcu_read_lock_raw()	2011-12-11 10:32:21 -08:00
rcutree.c	rcu: Augment rcu_batch_end tracing for idle and callback state	2011-12-11 10:32:22 -08:00
rcutree.h	rcu: Keep invoking callbacks if CPU otherwise idle	2011-12-11 10:32:09 -08:00
rcutree_plugin.h	rcu: Apply ACCESS_ONCE() to rcu_boost() return value	2011-12-11 10:33:19 -08:00
rcutree_trace.c	rcu: Track idleness independent of idle tasks	2011-12-11 10:31:24 -08:00
relay.c	switch debugfs to umode_t	2012-01-03 22:54:56 -05:00
res_counter.c	resource cgroups: remove bogus cast	2011-12-13 07:43:08 -08:00
resource.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
rtmutex-debug.c	lockdep, rtmutex, bug: Show taint flags on error	2011-12-06 08:16:49 +01:00
rtmutex-debug.h	…
rtmutex-tester.c	rtmutex-tester: convert sysdev_class to a regular subsystem	2011-12-14 14:54:22 -08:00
rtmutex.c	Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"	2011-12-11 10:33:18 -08:00
rtmutex.h	…
rtmutex_common.h	rtmutex: Simplify PI algorithm and make highest prio task get lock	2011-01-27 21:13:51 -05:00
rwsem.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
seccomp.c	…
semaphore.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
signal.c	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-01-09 12:59:24 -08:00
smp.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
softirq.c	rcu: Fix early call to rcu_idle_enter()	2011-12-11 10:31:38 -08:00
spinlock.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
srcu.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
stacktrace.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
stop_machine.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
sys.c	[S390] cputime: add sparse checking and cleanup	2011-12-15 14:56:19 +01:00
sys_ni.c	Cross Memory Attach	2011-10-31 17:30:44 -07:00
sysctl.c	Merge branch 'akpm' (Andrew's incoming)	2011-10-31 17:46:07 -07:00
sysctl_binary.c	binary_sysctl(): fix memory leak	2011-12-20 10:25:04 -08:00
sysctl_check.c	xfs: remove subdirectories	2011-08-12 16:21:35 -05:00
taskstats.c	Make TASKSTATS require root access	2011-09-19 17:04:37 -07:00
test_kprobes.c	kprobes: Fix selftest to clear flags field for reusing probes	2010-10-14 08:55:27 +02:00
time.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
timeconst.pl	…
timer.c	Merge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-01-06 07:53:34 -08:00
tracepoint.c	Tracepoint: Dissociate from module mutex	2011-08-10 20:38:14 -04:00
tsacct.c	[S390] cputime: add sparse checking and cleanup	2011-12-15 14:56:19 +01:00
uid16.c	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00
up.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
user-return-notifier.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
user.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
user_namespace.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
utsname.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
utsname_sysctl.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
wait.c	lockdep/waitqueues: Add better annotation	2011-12-21 10:07:39 +01:00
watchdog.c	watchdog: move watchdog_*_all_cpus under CONFIG_SYSCTL	2011-10-31 17:30:53 -07:00
workqueue.c	kernel: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
workqueue_sched.h	workqueue: implement concurrency managed dynamic worker pool	2010-06-29 10:07:14 +02:00