Messages in this thread Patch in this message | | | Date | Fri, 03 Apr 2009 20:27:11 -0400 | From | Steven Rostedt <> | Subject | [PATCH 08/10] ftrace: Add check of sched_stopped for probe_sched_wakeup |
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From: Zhaolei <zhaolei@cn.fujitsu.com>
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 <srostedt@redhat.com> --- 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 de35f20..9117cea 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]; -- 1.6.2.1 --
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