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| author | Zhaolei <zhaolei@cn.fujitsu.com> | 2009-03-31 09:24:51 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 14:01:11 +0200 |
| commit | 8bcae09b93e7f96f700b6bb372c2b3f2b36636dc (patch) | |
| tree | 035ba58e3d2faaf639da6225b52c6d8428ac9307 | |
| parent | function-graph: add proper initialization for init task (diff) | |
| download | linux-8bcae09b93e7f96f700b6bb372c2b3f2b36636dc.tar.xz linux-8bcae09b93e7f96f700b6bb372c2b3f2b36636dc.zip | |
ftrace: Add check of sched_stopped for probe_sched_wakeup
The wakeup tracing in sched_switch does not stop when a user
disables tracing. This is because the probe_sched_wakeup() is missing
the check to prevent the wakeup from being traced.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
LKML-Reference: <49D1C543.3010307@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/trace/trace_sched_switch.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index de35f200abd3..9117cea6f1ae 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -62,6 +62,9 @@ probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success) pc = preempt_count(); tracing_record_cmdline(current); + if (sched_stopped) + return; + local_irq_save(flags); cpu = raw_smp_processor_id(); data = ctx_trace->data[cpu]; |