linux-kernel - Re: [RFC PATCH] greatly reduce SLOB external fragmentation

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Message-ID: <4891CBA9.8030203@linux-foundation.org>
Date:	Thu, 31 Jul 2008 09:26:49 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Matt Mackall <mpm@...enic.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pekka J Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...e.hu>, Hugh Dickins <hugh@...itas.com>,
	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	vegard.nossum@...il.com, hannes@...urebad.de
Subject: Re: [RFC PATCH] greatly reduce SLOB external fragmentation

Matt Mackall wrote:

> Finally getting rid of SLAB is a much trickier proposition because SLUB
> still loses in a few important corner cases.

Which corner cases? I know about the reports on the TPC issue which I guess is a result of the avoidance of queueing in the cold free case. It would be good to have a small C program (under an open source license) that shows the issue.


 

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