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

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Date:	Mon, 12 May 2008 16:38:08 +0900
From:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
To:	"Rik van Riel" <riel@...hat.com>
Cc:	"Andi Kleen" <andi@...stfloor.org>,
	"Christoph Lameter" <clameter@....com>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	"Mel Gorman" <mel@...net.ie>,
	"Pekka Enberg" <penberg@...helsinki.fi>, mpm@...enic.com
Subject: Re: [patch 21/21] slab defrag: Obsolete SLAB

>> 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.
>
> Which can be the majority of object allocations and frees in some
> workloads.  It definately wants fixing.

Agreed, that situation is very frequency happend, IMHO.
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