Re: [PATCH] perf_counter: Fix a race on perf_counter_ctx

[Ingo Molnar]

* Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:

> On Fri, 2009-08-07 at 13:33 +0200, Ingo Molnar wrote:
> >  Peter, any ideas?
> 
> 
> > [  995.556131] ------------[ cut here ]------------
> > [  995.557128] WARNING: at kernel/perf_counter.c:1191 __perf_counter_task_sched_out+0x48/0x6b()
> 
> 
> Some yeah...

This patch fixed both the warning i was getting during stress-tests, 
and it also solved the hard lockup i was getting with the latest BTS 
patch.

( perf record never actually finishes even short workloads, due to
  the flood of kernel events coming in faster than it can record, so
  we grow and grow the perf.data - but that's a different matter, it
  does not lock up anymore. )

Markus, does latest -tip work fine for you, is the lockup fixed on 
your side as well?

	Ingo
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