Re: [PATCH -rt] fix preempt count underflow in user_trace_stop

2007-03-12 Thread Ingo Molnar
* Michal Schmidt <[EMAIL PROTECTED]> 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

[PATCH -rt] fix preempt count underflow in user_trace_stop

2007-03-12 Thread Michal Schmidt
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 underflow