linux-kernel - Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

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Message-Id: <E1IrWuB-0005nS-00@gondolin.me.apana.org.au>
Date:	Mon, 12 Nov 2007 18:52:35 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	davem@...emloft.net (David Miller)
Cc:	clameter@....com, akpm@...ux-foundation.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	mathieu.desnoyers@...ymtl.ca, penberg@...helsinki.fi
Subject: Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

David Miller <davem@...emloft.net> wrote:
> 
> Each IP compression tunnel instance does an alloc_percpu().

Actually all IPComp tunnels share one set of objects which are
allocated per-cpu.  So only the first tunnel would do that.

In fact that was precisely the reason why per-cpu is used in
IPComp as otherwise we can just allocate normal memory.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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