lkml.org 
[lkml]   [2007]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -rt] fix preempt count underflow in user_trace_stop

* 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,

Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-03-12 17:49    [W:0.658 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site