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

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Message-ID: <Pine.LNX.4.64.0701101731590.24010@schroedinger.engr.sgi.com>
Date:	Wed, 10 Jan 2007 17:40:26 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	David Chinner <dgc@....com>
cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	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:

> On Wed, Jan 10, 2007 at 04:43:36PM -0800, Christoph Lameter wrote:
> > You are comparing a debian 2.6.18 standard kernel with your tuned version 
> > of 2.6.20-rc3. There may be a lot of differences. Could you get us the 
> > config? Or use the same config file and build 2.6.20/18 the same way.
> 
> I took the /proc/config.gz from the debian 2.6.18-1 kernel as the
> base config for the 2.6.20-rc3 kernel and did a make oldconfig on
> it to make sure it was valid for the newer kernel but pretty much
> the same. I think that's the right process, so I don't think
> different build configs are the problem here.

Debian may have added extra patches that are not upstream. I see f.e. some 
of my post 2.6.18 patches in there.
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