linux-kernel - Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2

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Message-ID: <alpine.DEB.1.10.0902261127230.17756@qirst.com>
Date:	Thu, 26 Feb 2009 11:28:03 -0500 (EST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Mel Gorman <mel@....ul.ie>, Lin Ming <ming.m.lin@...el.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2

On Thu, 26 Feb 2009, Pekka Enberg wrote:

> > > UDP-U-4k	-2%		0%		-2%
> >
> > Pekka, for this test was SLUB or the page allocator handling the 4K
> > allocations?
>
> The page allocator. The pass-through revert is not in 2.6.29-rc6 and I
> won't be sending it until 2.6.30 opens up.

The page allocator will handle allocs >4k. 4k itself is already buffered
since we saw tbench regressions if we passed 4k through.

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