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Message-Id: <1160594021.16513.68.camel@localhost.localdomain>
Date: Wed, 11 Oct 2006 20:13:41 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: Heinz Ulrich Stille <hus@...ign-d.de>
Cc: linux-kernel@...r.kernel.org
Subject: Re: it821x eats CPU?
Ar Sad, 2006-10-07 am 09:27 +0200, ysgrifennodd Heinz Ulrich Stille:
> Looking through the logs I notices that it821x was in "smart" mode,
> so I restarted the system with "noraid=1" to get into "pass through".
> Now everything is back to normal. A large dd did about 40MB/s without
> disturbing other processes.
In some configurations the it821x driver was not enabling DMA in smart
mode.
> Wasn't smart mode the one supposed to be the one reducing CPU load?
For RAID1 yes, otherwise not measurably at all.
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