linux-kernel - Re: [this_cpu_xx V7 0/8] Per cpu atomics in core allocators and cleanup

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Message-ID: <4B283BFE.2040005@kernel.org>
Date:	Wed, 16 Dec 2009 10:46:38 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
CC:	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Mel Gorman <mel@....ul.ie>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [this_cpu_xx V7 0/8] Per cpu atomics in core allocators and	cleanup

Hello,

On 12/16/2009 10:40 AM, Mathieu Desnoyers wrote:
> Nope, there is the same number of sub-buffers for each per-cpu buffer.
> I just want to see if supplementary indirections are allowed after
> dereferencing the per-cpu pointer ?

Hmmm... you can store percpu pointer to a variable.  If there are the
same number of commit_count for each cpu, they can be allocated using
percpu allocator and their pointers can be stored, offset and
dereferenced.  Would that be enough?

Thanks.

-- 
tejun
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