linux-kernel - Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown

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Message-ID: <Pine.LNX.4.64.0701101503310.22578@schroedinger.engr.sgi.com>
Date:	Wed, 10 Jan 2007 15:04:15 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	David Chinner <dgc@....com>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown

On Thu, 11 Jan 2007, David Chinner wrote:

> The performance and smoothness is fully restored on 2.6.20-rc3
> by setting dirty_ratio down to 10 (from the default 40), so
> something in the VM is not working as well as it used to....

dirty_background_ratio is left as is at 10? So you gain performance
by switching off background writes via pdflush?
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