linux-kernel - Re: [patch 21/21] slab defrag: Obsolete SLAB

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Date:	Sat, 10 May 2008 11:53:30 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <clameter@....com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Mel Gorman <mel@...net.ie>,
	Rik van Riel <riel@...hat.com>,
	Pekka Enberg <penberg@...helsinki.fi>, mpm@...enic.com
Subject: Re: [patch 21/21] slab defrag: Obsolete SLAB

Christoph Lameter wrote:
> Slab defragmentation introduces new functionality not supported by SLAB and
> SLOB.
> 
> Make slab depend on EXPERIMENTAL and note its obsoleteness and that
> various functionality is not supported by SLAB.
> 
> Also update SLOB's description a bit to indicate that certain OS
> support is limited by design.

What about the TPC performance regressions? My understanding was that
slub still performed worse in the "object allocated on one CPU, freed on
the other CPU" type workloads due to less batching.

-Andi
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