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Subject: Re: [CFT] Bus mastering support for IDE CDROM audio
From: Ed Sweetman <ed.sweetman@wmich.edu>
To: Kristian <kristian.peters@korseby.net>
Cc: akpm@zip.com.au, linux-kernel@vger.kernel.org
In-Reply-To: <20020127111917.3c019701.kristian.peters@korseby.net>
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Date: 27 Jan 2002 14:54:21 -0500
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You might want to try sending your cdroms into sleep when dma mode wont
work anymore.  That usually fixes things for me.    hdparm -Y  ....the
kernel should wake them up immediately and things should work again.  


On Sun, 2002-01-27 at 05:19, Kristian wrote:
> Hello again.
> 
> Ok. Sorry. My fault. The second patch produces the same throughput... I didn't realized that the kernel disabled DMA during rebooting. My drives only went to DMA again after a cold boot. Don't know what's going on here. But after a normal reboot, my drives are in PIO only and don't support DMA.
> 
> cdparanoia on /dev/scd0 now gives the same result as with the first patch.
> real    1m8.055s
> user    0m6.740s
> sys     0m2.850s
> 
> *Kristian
> 
>   :... [snd.science] ...:
>  ::
>  :: http://www.korseby.net
>  :: http://gsmp.sf.net
>   :.........................:: ~/$ kristian@korseby.net :
> -
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