Commit 8bcae09b authored Mar 31, 2009 by Zhaolei Committed by Ingo Molnar Apr 07, 2009

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>

parent 5ac9f622

kernel/trace/trace_sched_switch.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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];