linux-kernel - Re: [RFC PATCH 1/2] perf_events: add support for per-cpu per-cgroup monitoring (v2)

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Date:	Wed, 08 Sep 2010 15:57:01 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	eranian@...il.com
Cc:	eranian@...gle.com, linux-kernel@...r.kernel.org, mingo@...e.hu,
	paulus@...ba.org, davem@...emloft.net, fweisbec@...il.com,
	perfmon2-devel@...ts.sf.net, robert.richter@....com,
	acme@...hat.com
Subject: Re: [RFC PATCH 1/2] perf_events: add support for per-cpu
 per-cgroup monitoring (v2)

On Wed, 2010-09-08 at 15:56 +0200, stephane eranian wrote:
> On Wed, Sep 8, 2010 at 3:52 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> > On Wed, 2010-09-08 at 15:30 +0200, Stephane Eranian wrote:
> >> +       } times[NR_CPUS] ____cacheline_aligned_in_smp;
> >
> > That's fail! NR_CPUS can be like 4k for distro configs.
> >
> How do you do this on struct that are dynamically allocated?
> The number of css is dynamic.

alloc_percpu()?
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