Messages in this thread | | | Date | Sun, 22 Mar 2009 21:41:56 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/5] [GIT PULL] updates for tip/tracing/ftrace |
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* Ingo Molnar <mingo@elte.hu> wrote:
> found another, unrelated lockup with the event tracer: > > europe:/debug/tracing/events/sched/sched_wakeup_new> cat enable > 0 > europe:/debug/tracing/events/sched/sched_wakeup_new> echo 1 > enable > europe:/debug/tracing/events/sched/sched_wakeup_new> sync > europe:/debug/tracing/events/sched/sched_wakeup_new> cat > ../../../trace_pipe > <...>-2870 [000] 688.730160: sched_wakeup_new: task > bash:2898 [120] success=1 > <...>-2870 [001] 689.945375: sched_wakeup_new: task > bash:2899 [120] success=1 > > [hard lockup]
ok, tracked it down - it's the new trace_wake_up() from within wake_up_new_task() => bad idea.
I think this was introduced via:
6eaaa5d: tracing/core: use appropriate waiting on trace_pipe
Ingo
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