linux-kernel - Re: [PATCH 08/40] mm: kmem_cache

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Message-ID: <463B815E.8010806@cs.helsinki.fi>
Date:	Fri, 04 May 2007 21:54:22 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Christoph Lameter <clameter@....com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	netdev@...r.kernel.org,
	Trond Myklebust <trond.myklebust@....uio.no>,
	Thomas Graf <tgraf@...g.ch>,
	David Miller <davem@...emloft.net>,
	James Bottomley <James.Bottomley@...elEye.com>,
	Mike Christie <michaelc@...wisc.edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Phillips <phillips@...gle.com>
Subject: Re: [PATCH 08/40] mm: kmem_cache_objsize

Christoph Lameter wrote:
> On Fri, 4 May 2007, Pekka Enberg wrote:
> 
>> Again, slab has no way of actually estimating how many pages you need for a
>> given number of objects. So we end up calculating some upper bound which
>> doesn't belong in mm/slab.c. I am perfectly okay with:
> 
> It can give a worst case number and that is what he wants.

Sure. But he can calculate that elsewhere instead of bringing it in 
mm/slab.c where it's no use for anyone else...


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