Messages in this thread | | | Date | Tue, 2 Jun 2009 01:14:28 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] perf_counter: Provide functions for locking and pinning the context for a task |
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* Paul Mackerras <paulus@samba.org> wrote:
> Ingo Molnar writes: > > > -tip testing found that these patches are causing a crash: > > Argh. What was userspace doing at the time of the crash, do you > know? It looks like it might have been on/off-lining a cpu, > judging by the stack trace. Would there have been any counters > attached to the task doing there, or were there any per-cpu > counters active?
Yeah, indeed that box has a CPU hotplug testcase - sets cpu1 to offline then online.
There should be no counters active anywhere during that.
Ingo
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