linux-kernel - Re: [patch] SLQB slab allocator (try 2)

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Message-ID: <4999C199.4090202@cs.helsinki.fi>
Date:	Mon, 16 Feb 2009 21:42:17 +0200
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Mel Gorman <mel@....ul.ie>
CC:	Nick Piggin <nickpiggin@...oo.com.au>,
	Nick Piggin <npiggin@...e.de>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lin Ming <ming.m.lin@...el.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [patch] SLQB slab allocator (try 2)

Mel Gorman wrote:
>> There's a follow-up patch from Yanmin which
>> will make a difference for large allocations when page-allocator
>> pass-through is reverted:
>>
>> http://git.kernel.org/?p=linux/kernel/git/penberg/slab-2.6.git;a=commitdiff;h=79b350ab63458ef1d11747b4f119baea96771a6e
> 
> Is this expected to make a difference to workloads that are not that
> allocator intensive? I doubt it'll make much different to speccpu but
> conceivably it makes a difference to sysbench.

I doubt that too but I fail to see why it's regressing with the revert 
in the first place for speccpu. Maybe it's cache effects, dunno.

			Pekka
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