Message-ID: <464CB2B3.50506@s5r6.in-berlin.de>
Date: Thu, 17 May 2007 21:53:23 +0200
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
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To: lkml@dervishd.net
CC: linux-kernel@vger.kernel.org
Subject: Re: usb-storage nice value
References: <20070517100308.GA14667@DervishD>
In-Reply-To: <20070517100308.GA14667@DervishD>
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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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