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

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Message-ID: <20080110181315.GA1047@one.firstfloor.org>
Date:	Thu, 10 Jan 2008 19:13:15 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Pekka J Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>,
	Christoph Lameter <clameter@....com>,
	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>
Subject: Re: [RFC PATCH] greatly reduce SLOB external fragmentation

> I would suggest that if you guys are really serious about memory use, try 
> to do a size-based heap thing, and do best-fit in that heap. Or just some 

iirc best fit usually also has some nasty long term fragmentation behaviour.
That is why it is usually also not used.

-Andi
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