linux-kernel - Re: [patch 00/14] Page cache cleanup in anticipation of Large Blocksize support

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Message-ID: <Pine.LNX.4.64.0706171907360.26680@schroedinger.engr.sgi.com>
Date:	Sun, 17 Jun 2007 19:08:41 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Matt Mackall <mpm@...enic.com>
cc:	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, hch@...radead.org
Subject: Re: [patch 00/14] Page cache cleanup in anticipation of Large
 Blocksize support

On Sun, 17 Jun 2007, Matt Mackall wrote:

> Is it? Last I looked it had reverted to handing out reverse-contiguous
> pages.

I thought that was fixed? Bill Irwin was working on it.

But the contiguous pages usually only work shortly after boot. After 
awhile memory gets sufficiently scrambled that the coalescing in the I/O 
layer becomes ineffective.
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