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SubjectRe: [PATCH RFC] perf_counter: Don't swap contexts containing locked mutex
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On Fri, 2009-05-29 at 21:13 +1000, Paul Mackerras wrote:
> Ingo Molnar writes:
>
> > looping in the remove-context retry loop.
>
> Ah! We need to reload task inside the loop. And possibly in other
> places.

Thing is, after your patch this is called after the unclone, so the
context should be stable, still we see this. But yeah that loop needs
some care.

I also noticed we have races on cpuctx->task_ctx, I was looking at
removing it alltogether in favour of current->perf_counter_ctxp.




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