Messages in this thread | | | Date | Mon, 12 Mar 2007 17:46:00 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH -rt] fix preempt count underflow in user_trace_stop |
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* Michal Schmidt <mschmidt@redhat.com> wrote:
> When playing with trace_user_trigger_irq in order to trace > IRQ->userspace latencies, I encountered a bug in the latency tracer. > If I have wakeup_timing enabled and attempt to stop the trace in my > userspace program, the system crashes. This is caused by an unbalanced > preempt_enable() which underflows the preempt count.
good catch! I've applied it,
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