iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
14a866c567e040ccf6240d68b083dd1dbbde63e6
linux/kernel
History
Steven Rostedt 14a866c567 ftrace: add ftrace_graph_stop() 
Impact: new ftrace_graph_stop function

While developing more features of function graph, I hit a bug that
caused the WARN_ON to trigger in the prepare_ftrace_return function.
Well, it was hard for me to find out that was happening because the
bug would not print, it would just cause a hard lockup or reboot.
The reason is that it is not safe to call printk from this function.

Looking further, I also found that it calls unregister_ftrace_graph,
which grabs a mutex and calls kstop machine. This would definitely
lock the box up if it were to trigger.

This patch adds a fast and safe ftrace_graph_stop() which will
stop the function tracer. Then it is safe to call the WARN ON.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-03 08:56:23 +01:00
..
irq
genirq: __irq_set_trigger: change pr_warning to pr_debug
2008-11-13 11:59:48 +01:00
power
tracing: allow tracing of suspend/resume & hibernation code again
2008-11-23 10:48:44 +01:00
time
nohz: disable tick_nohz_kick_tick() for now
2008-11-10 22:39:27 +01:00
trace
ftrace: add ftrace_graph_stop()
2008-12-03 08:56:23 +01:00
.gitignore
Update kernel/.gitignore with new auto-generated files
2008-02-09 23:27:01 -08:00
acct.c
tty: Fix abusers of current->sighand->tty
2008-10-13 09:51:42 -07:00
audit_tree.c
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
audit.c
[PATCH] Fix the bug of using AUDIT_STATUS_RATE_LIMIT when set fail, no error output.
2008-08-01 12:15:16 -04:00
audit.h
[PATCH 1/2] audit: move extern declarations to audit.h
2008-04-28 06:28:04 -04:00
auditfilter.c
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
auditsc.c
tty: Fix abusers of current->sighand->tty
2008-10-13 09:51:42 -07:00
backtracetest.c
backtrace: replace timer with tasklet + completions
2008-06-27 18:09:16 +02:00
bounds.c
Add kbuild.h that contains common definitions for kbuild users
2008-04-29 08:06:29 -07:00
capability.c
security: Fix setting of PF_SUPERPRIV by __capable()
2008-08-14 22:59:43 +10:00
cgroup_debug.c
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
cgroup_freezer.c
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
cgroup.c
cgroups: fix a serious bug in cgroupstats
2008-11-19 18:50:00 -08:00
compat.c
Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus
2008-10-20 13:14:06 +02:00
configs.c
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
cpu.c
cpuinit fixes in kernel/*
2008-11-30 10:03:37 -08:00
cpuset.c
sched, cpusets: fix warning in kernel/cpuset.c
2008-11-29 20:39:29 +01:00
delayacct.c
per-task-delay-accounting: update taskstats for memory reclaim delay
2008-07-25 10:53:47 -07:00
dma-coherent.c
dma-coherent: export dma_[alloc|release]_from_coherent methods
2008-08-22 08:34:53 +02:00
dma.c
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
exec_domain.c
proc: move /proc/execdomains to kernel/exec_domain.c
2008-10-23 14:30:41 +04:00
exit.c
tracing/function-return-tracer: free the return stack on free_task()
2008-11-23 22:34:02 +01:00
extable.c
module: Don't report discarded init pages as kernel text.
2008-01-29 17:13:18 +11:00
fork.c
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
freezer.c
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
futex_compat.c
futex_compat __user annotation
2008-03-30 14:18:41 -07:00
futex.c
hrtimer: make the futex() system call use the per process slack value
2008-09-11 07:17:00 -07:00
hrtimer.c
hrtimer: clean up unused callback modes
2008-11-12 09:54:40 +01:00
itimer.c
timers: fix itimer/many thread hang
2008-09-14 16:25:35 +02:00
kallsyms.c
sprint_symbol(): use less stack
2008-11-19 18:49:58 -08:00
Kconfig.freezer
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
Kconfig.hz
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
Kconfig.preempt
rcu: move PREEMPT_RCU config option back under PREEMPT
2008-03-10 18:01:20 -07:00
kexec.c
kexec: fix crash_save_vmcoreinfo_init build problem
2008-10-20 15:28:50 -07:00
kfifo.c
…
kgdb.c
kgdb: call touch_softlockup_watchdog on resume
2008-10-06 13:50:59 -05:00
kmod.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
2008-10-16 12:38:34 -07:00
kprobes.c
kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds
2008-11-12 17:17:17 -08:00
ksysfs.c
profiling: dynamically enable readprofile at runtime
2008-10-16 11:21:31 -07:00
kthread.c
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
latencytop.c
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
lockdep_internals.h
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockdep_proc.c
lockstat: fix numerical output rounding error
2008-08-26 10:37:46 +02:00
lockdep.c
ftrace: replace raw_local_irq_save with local_irq_save
2008-12-03 08:56:19 +01:00
Makefile
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
marker.c
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
module.c
Merge branches 'tracing/branch-tracer', 'tracing/ftrace', 'tracing/function-return-tracer', 'tracing/tracepoints' and 'tracing/urgent' into tracing/core
2008-11-17 09:36:22 +01:00
mutex-debug.c
mutex-debug: check mutex magic before owner
2008-05-16 16:53:35 +02:00
mutex-debug.h
…
mutex.c
locking: fix mutex @key parameter kernel-doc notation
2008-07-28 18:12:36 +02:00
mutex.h
…
notifier.c
ftrace: ignore functions that cannot be kprobe-ed
2008-10-14 10:34:22 +02:00
ns_cgroup.c
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
nsproxy.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
panic.c
taint: add missing comment
2008-12-01 19:55:24 -08:00
params.c
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pid_namespace.c
pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits
2008-09-02 19:21:38 -07:00
pid.c
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
pm_qos_params.c
pm_qos_requirement might sleep
2008-09-02 19:21:40 -07:00
posix-cpu-timers.c
sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers
2008-11-17 16:49:35 +01:00
posix-timers.c
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
printk.c
printk: remove unused code from kernel/printk.c
2008-10-23 21:54:29 +02:00
profile.c
Merge commit 'v2.6.28-rc7'; branch 'x86/dumpstack' into tracing/ftrace
2008-12-03 08:55:34 +01:00
ptrace.c
remove __ARCH_WANT_COMPAT_SYS_PTRACE
2008-11-30 11:00:15 -08:00
rcuclassic.c
rcu: RCU-based detection of stalled CPUs for Classic RCU, fix
2008-10-03 10:41:00 +02:00
rcupdate.c
rcupdate: fix bug of rcu_barrier*()
2008-10-21 15:59:53 +02:00
rcupreempt_trace.c
rcu: trace fix possible mem-leak
2008-08-15 17:54:40 +02:00
rcupreempt.c
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 08:52:40 -07:00
rcutorture.c
byteorder: remove direct includes of linux/byteorder/swab[b].h
2008-10-20 12:51:53 -07:00
relay.c
relay: fix cpu offline problem
2008-11-18 15:08:56 +01:00
res_counter.c
cgroup files: convert res_counter_write() to be a cgroups write_string() handler
2008-07-25 10:53:36 -07:00
resource.c
reserve_region_with_split: Fix GFP_KERNEL usage under spinlock
2008-11-01 09:53:58 -07:00
rtmutex_common.h
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
rtmutex-debug.c
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
rtmutex-debug.h
…
rtmutex-tester.c
sysdev: Pass the attribute to the low level sysdev show/store function
2008-07-21 21:55:02 -07:00
rtmutex.c
hrtimer: convert kernel/* to the new hrtimer apis
2008-09-05 21:35:13 -07:00
rtmutex.h
…
rwsem.c
sched: mark rwsem functions as __sched for wchan/profiling
2007-12-18 15:21:13 +01:00
sched_clock.c
sched_clock: prevent scd->clock from moving backwards
2008-10-10 11:17:04 +02:00
sched_cpupri.c
sched: use a 2-d bitmap for searching lowest-pri CPU
2008-06-06 15:19:28 +02:00
sched_cpupri.h
sched: fix the cpuprio count really
2008-06-06 15:19:44 +02:00
sched_debug.c
sched: fix kernel warning on /proc/sched_debug access
2008-11-16 08:07:15 +01:00
sched_fair.c
sched: release buddies on yield
2008-11-11 11:57:22 +01:00
sched_features.h
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched_idletask.c
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
sched_rt.c
Merge commit 'v2.6.28-rc1' into sched/urgent
2008-10-24 12:48:46 +02:00
sched_stats.h
sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers
2008-11-17 16:49:35 +01:00
sched.c
Merge commit 'v2.6.28-rc7'; branch 'x86/dumpstack' into tracing/ftrace
2008-12-03 08:55:34 +01:00
seccomp.c
…
semaphore.c
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
signal.c
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
smp.c
generic-ipi: fix the smp_mb() placement
2008-11-06 08:41:56 +01:00
softirq.c
irq: call __irq_enter() before calling the tick_idle_check
2008-11-10 22:36:39 +01:00
softlockup.c
Make the taint flags reliable
2008-10-16 11:21:31 -07:00
spinlock.c
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
srcu.c
make srcu_readers_active() static
2008-02-06 10:41:02 -08:00
stacktrace.c
stacktrace: fix modular build, export print_stack_trace and save_stack_trace
2008-06-30 09:20:55 +02:00
stop_machine.c
stop_machine: fix race with return value (fixes Bug #11989)
2008-11-16 15:09:52 -08:00
sys_ni.c
reintroduce accept4
2008-11-19 18:49:57 -08:00
sys.c
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
sysctl_check.c
sysctl: check for bogus modes
2008-07-25 10:53:45 -07:00
sysctl.c
Merge commit 'v2.6.28-rc7'; branch 'x86/dumpstack' into tracing/ftrace
2008-12-03 08:55:34 +01:00
taskstats.c
taskstats: remove initialization of static per-cpu variable
2008-07-25 10:53:47 -07:00
test_kprobes.c
kprobes: kretprobe user entry-handler
2008-02-06 10:41:11 -08:00
time.c
select: add a timespec_add_safe() function
2008-09-05 21:34:57 -07:00
timeconst.pl
Make constants in kernel/timeconst.h fixed 64 bits
2008-05-02 16:18:42 -07:00
timer.c
Add round_jiffies_up and related routines
2008-11-06 08:42:48 +01:00
tracepoint.c
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
tsacct.c
task IO accounting: move all IO statistics in struct task_io_accounting
2008-07-27 16:12:28 -07:00
uid16.c
asmlinkage_protect replaces prevent_tail_call
2008-04-10 17:28:26 -07:00
user_namespace.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
user.c
sched: rt-bandwidth for user grouping interface
2008-08-19 13:10:09 +02:00
utsname_sysctl.c
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
utsname.c
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
wait.c
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
workqueue.c
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00