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| author | Changbin Du <changbin.du@gmail.com> | 2019-01-17 00:02:49 +0800 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-02-06 11:56:19 -0500 |
| commit | f52d569f3d929d9530d75976baa191d2d50fc51b (patch) | |
| tree | 155be0987d5d85fb8717589ce32ca213a45727a6 /kernel | |
| parent | 88d380eb0668b7fe76834c1febef4165508098b6 (diff) | |
| download | linux-0-day-f52d569f3d929d9530d75976baa191d2d50fc51b.tar.gz linux-0-day-f52d569f3d929d9530d75976baa191d2d50fc51b.tar.xz | |
tracing: Show stacktrace for wakeup tracers
This align the behavior of wakeup tracers with irqsoff latency tracer
that we record stacktrace at the beginning and end of waking up. The
stacktrace shows us what is happening in the kernel.
Link: http://lkml.kernel.org/r/20190116160249.7554-1-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_sched_wakeup.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c index da5b6e0128407..f4fe7d1781e95 100644 --- a/kernel/trace/trace_sched_wakeup.c +++ b/kernel/trace/trace_sched_wakeup.c @@ -475,6 +475,7 @@ probe_wakeup_sched_switch(void *ignore, bool preempt, __trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc); tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc); + __trace_stack(wakeup_trace, flags, 0, pc); T0 = data->preempt_timestamp; T1 = ftrace_now(cpu); @@ -586,6 +587,7 @@ probe_wakeup(void *ignore, struct task_struct *p) data = per_cpu_ptr(wakeup_trace->trace_buffer.data, wakeup_cpu); data->preempt_timestamp = ftrace_now(cpu); tracing_sched_wakeup_trace(wakeup_trace, p, current, flags, pc); + __trace_stack(wakeup_trace, flags, 0, pc); /* * We must be careful in using CALLER_ADDR2. But since wake_up |