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Message-ID: <464CB2B3.50506@s5r6.in-berlin.de>
Date:	Thu, 17 May 2007 21:53:23 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	lkml@...vishd.net
CC:	linux-kernel@...r.kernel.org
Subject: Re: usb-storage nice value

DervishD wrote:
>     I'm having problems when reading/writing to external USB harddisks:
> my *internal* harddisk stalls from time to time, so watching a movie
> while copying data is a PITA (well, if the movie is bad, the leaps help
> a bit...).

If the internal harddisk is source or target of these copy operations...

...
> is there any way of modifying the pdflush behaviour so
> large buffered writes are less "agressive" and doesn't block apps which
> are just reading?

...then switching to another IO scheduler might perhaps help.

# cat /sys/block/hda/queue/scheduler

# echo deadline > /sys/block/hda/queue/scheduler
-- 
Stefan Richter
-=====-=-=== -=-= =---=
http://arcgraph.de/sr/
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