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Date: Sun, 20 Sep 2009 08:07:28 +0200 From: Arjan van de Ven <arjan@...radead.org> To: Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Poor desktop responsiveness with background I/O-operations On Sun, 20 Sep 2009 05:08:43 +0200 Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de> wrote: > > Observation: > - The system becomes _really_ slow as described above; unusable for > any multimedia tasks. > > - Using an encrypted (dm-crypt/LUKS) /home (e.g. on mobile computers) > compounds the issue to a painful extent. > > > > Possible culprits (I'm guessing) are the Linux I/O- or CPU scheduler. this has nothing to do with the cpu scheduler.... can you try the following two things? echo 4096 > /sys/block/sda/queue/nr_requests for i in `pidof kjournald` ; do ionice -c1 -p $i ; done to see if they help? they tweak the IO scheduler... I assume you're using CFQ. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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