linux-kernel - perf cgroup per-task attaching

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Message-ID: <20110531140359.GA13134@aftab>
Date:	Tue, 31 May 2011 16:03:59 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ben Blum <bblum@...rew.cmu.edu>,
	Stephane Eranian <eranian@...gle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: perf cgroup per-task attaching

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.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
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Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen
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