linux-kernel - Re: [git patches] libata ACPI support

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Message-ID: <20070220232633.GA3598@mail.muni.cz>
Date:	Wed, 21 Feb 2007 00:26:33 +0100
From:	Lukas Hejtmanek <xhejtman@...l.muni.cz>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [git patches] libata ACPI support

On Tue, Feb 20, 2007 at 05:23:21PM -0500, Jeff Garzik wrote:
> >introducing SATA ACPI does not work for me (I've filled the bug
> >report: http://bugzilla.kernel.org/show_bug.cgi?id=8046) beside those error
> >messages, IDE performance is decreased. libata.noacpi=1 option works ok but
> >the performance is still slightly degraded (about 10%).
> 
> Does performance come back if you also use acpi=off ?

It does not.

With 2.6.20-git15, hdparm -t /dev/sda says 28MB/s, 
with 2.6.20, hdparm -t /dev/sda says 32MB/s.

-- 
Lukáš Hejtmánek
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