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Message-ID: <58cb370e05070408417dc3c067@mail.gmail.com>
Date: Mon, 4 Jul 2005 17:41:34 +0200
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Reply-To: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Al Boldi <a1426z@gawab.com>
Subject: Re: [git patches] IDE update
Cc: Linus Torvalds <torvalds@osdl.org>, linux-ide@vger.kernel.org,
       linux-kernel@vger.kernel.org
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On 7/4/05, Al Boldi <a1426z@gawab.com> wrote:
> Bartlomiej Zolnierkiewicz wrote: {
> What is the "int/dma problem"?
> }
> 
> Hdparm -tT gives 38mb/s in 2.4.31
> Cat /dev/hda > /dev/null gives 2% user 33% sys 65% idle
> 
> Hdparm -tT gives 28mb/s in 2.6.12
> Cat /dev/hda > /dev/null gives 2% user 25% sys 0% idle 73% IOWAIT
> 
> It feels like DMA is not being applied properly in 2.6.12.
> 
> Your comments please.

Are earlier 2.6.x kernels okay?

dmesg output?

Bartlomiej