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

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Date:	Tue, 31 May 2011 16:13:12 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
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, May 31, 2011 at 10:07:40AM -0400, Peter Zijlstra wrote:
> 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

Hehe, that happened today already! :)

Thanks.

-- 
Regards/Gruss,
Boris.

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