From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Al Boldi" <a1426z@gawab.com>
Subject: RE: Organized summary of the pacthes
Date: Thu, 30 Jun 2005 15:45:45 +0300
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To: 'Albert Lee' <albertcc@tw.ibm.com>, 'Jeff Garzik' <jgarzik@pobox.com>
Cc: doug_maxey@us.ibm.com, linux-ide@vger.kernel.org, 'Bartlomiej Zolnierkiewicz' <B.Zolnierkiewicz@elka.pw.edu.pl>, 'Alan Cox' <alan@lxorguk.ukuu.org.uk>, 'Tejun Heo' <htejun@gmail.com>, 'Benjamin Herrenschmidt' <benh@kernel.crashing.org>

By the way,
Why is the ide-driver in so slow?
Hdparm -tT gives 28mb/s in 2.6.12 
Cat /dev/hda > /dev/null gives 2% user 25% sys 0% idle 73% IOWAIT

Hdparm -tT gives 38mb/s in 2.4.31
Cat /dev/hda > /dev/null gives 2% user 33% sys 65% idle

It feels like DMA is not being applied properly in 2.6.12.

Your comments please.

Thanks!