linux-kernel - Re: PROBLEM: SATA AHCI driver significant throughput loss in 2.6.22-rc5-g75154f40-dirty

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Message-Id: <20070630005747.9bc9ba40.akpm@linux-foundation.org>
Date:	Sat, 30 Jun 2007 00:57:47 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dan <metalifloyd@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: PROBLEM: SATA AHCI driver significant throughput loss in
 2.6.22-rc5-g75154f40-dirty

On Wed, 27 Jun 2007 00:17:24 -0400 Dan <metalifloyd@...il.com> wrote:

> Something changed with the AHCI SATA driver in the latest git version.
> With 2.6.21 I get ~49MB/sec according to hdparm. Using the latest git
> version I only get ~8MB/sec. I've attached my .config and have
> included some info about my system below. Please let me know if you
> need more information or if I can help test anything.
> 
> Lenovo Thinkpad T60p

Until we know how widespread this damage is, we'd need to consider this
a blocking bug.

Are you able (as a matter of some urgency) to run a git bisection 
search to identify the offending commit?

Thanks.
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