linux-kernel - Re: perf cgroup per-task attaching

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Date:	Tue, 31 May 2011 16:07:40 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Borislav Petkov <bp@...64.org>
Cc:	Ben Blum <bblum@...rew.cmu.edu>,
	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf cgroup per-task attaching

On Tue, 2011-05-31 at 16:03 +0200, Borislav Petkov wrote:
> Just FYI:
> 
> I'm getting
> 
> kernel/events/core.c:7445: warning: initialization from incompatible pointer type
> 
> when building -rc1 with CONFIG_CGROUP_PERF enabled. AFAICT, this is
> due to the fact that f780bdb7c1c73009cb57adcf99ef50027d80bf3c dropped
> the threadgroup arg from cgroup_subsys->attach in favour of per-thread
> callbacks.
> 
> perf_cgroup_attach() actually does reschedule the task context after
> the cgroup changes so the perf cgroup code would need some non-trivial
> adjusting to the new APIs.

lkml.kernel.org/r/tip-74c355fbdfedd3820046dba4f537876cea54c207@....kernel.org
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