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authorZhaolei <zhaolei@cn.fujitsu.com>2009-03-31 03:24:51 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-07 08:01:11 -0400
commit8bcae09b93e7f96f700b6bb372c2b3f2b36636dc (patch)
tree035ba58e3d2faaf639da6225b52c6d8428ac9307
parent5ac9f62267dc92c7735c642a5942d9e6c1190308 (diff)
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.c3
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)
62 pc = preempt_count(); 62 pc = preempt_count();
63 tracing_record_cmdline(current); 63 tracing_record_cmdline(current);
64 64
65 if (sched_stopped)
66 return;
67
65 local_irq_save(flags); 68 local_irq_save(flags);
66 cpu = raw_smp_processor_id(); 69 cpu = raw_smp_processor_id();
67 data = ctx_trace->data[cpu]; 70 data = ctx_trace->data[cpu];