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Message-ID: <49D1C543.3010307@cn.fujitsu.com> Date: Tue, 31 Mar 2009 15:24:51 +0800 From: Zhaolei <zhaolei@...fujitsu.com> To: Zhaolei <zhaolei@...fujitsu.com> CC: Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org Subject: [PATCH v2 1/2] ftrace: Add check of sched_stopped for probe_sched_wakeup We need check sched_stopped in probe_sched_wakeup() to stop tracing when an user stops it. But current code can also do the right thing(stop tracing after echo 0 > tracing_enabled) just because tracing_sched_wakeup_trace() can return on buffer->record_disabled. Signed-off-by: Zhao Lei <zhaolei@...fujitsu.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]; -- 1.5.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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