linux-kernel - Re: No, really, stop trying to delete slab until you've finished making slub perform as well

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Message-ID: <48973A2B.3040304@linux-foundation.org>
Date:	Mon, 04 Aug 2008 12:19:39 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	KOSAKI Motohiro <m-kosaki@...es.dti.ne.jp>
CC:	Matthew Wilcox <matthew@....cx>,
	Pekka Enberg <penberg@...helsinki.fi>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Mel Gorman <mel@...net.ie>,
	andi@...stfloor.org, Rik van Riel <riel@...hat.com>,
	kosaki.motohiro@...fujitsu.com
Subject: Re: No, really, stop trying to delete slab until you've finished
 making slub perform as well

KOSAKI Motohiro wrote:
>
> When hackbench running, SLUB consume memory very largely than SLAB.
> then, SLAB often outperform SLUB in memory stavation state.

Re memory use: If SLUB finds that there is lock contention on a slab page then
it will allocate a new one and dedicate it to a cpu in order to avoid future
contentions.

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