From: Arjan van de Ven <arjan@infradead.org>
To: Ulrich Lukas <stellplatz-nr.13a@datenparkplatz.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Poor desktop responsiveness with background I/O-operations
Date: Sun, 20 Sep 2009 08:07:28 +0200 [thread overview]
Message-ID: <20090920080728.73bfe2a1@infradead.org> (raw)
In-Reply-To: <4AB59CBB.8090907@datenparkplatz.de>
On Sun, 20 Sep 2009 05:08:43 +0200
Ulrich Lukas <stellplatz-nr.13a@datenparkplatz.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.
next prev parent reply other threads:[~2009-09-20 6:07 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-20 3:08 Poor desktop responsiveness with background I/O-operations Ulrich Lukas
2009-09-20 4:11 ` Thomas Fjellstrom
2009-09-20 6:07 ` Arjan van de Ven [this message]
2009-09-20 8:50 ` Ulrich Lukas
2009-09-20 17:17 ` Nikos Chantziaras
2009-09-20 19:38 ` Mike Galbraith
2009-09-21 0:22 ` Justin P. Mattock
2009-09-21 4:23 ` Mike Galbraith
2009-09-21 7:48 ` Ulrich Lukas
2009-09-21 8:06 ` Mike Galbraith
2009-09-21 19:47 ` James Cloos
2009-09-21 22:47 ` Nikos Chantziaras
2009-09-21 23:34 ` James Cloos
2009-09-22 7:06 ` Mike Galbraith
2009-09-22 9:20 ` Mike Galbraith
2009-09-22 11:22 ` Henrique de Moraes Holschuh
2009-09-22 11:32 ` Mike Galbraith
2009-09-22 16:58 ` James Cloos
2009-09-20 17:04 ` Ulrich Lukas
2009-09-20 20:22 ` Jiri Kosina
2009-09-20 22:04 ` Jan Kara
2009-09-21 7:25 ` Mike Galbraith
2009-09-21 7:33 ` Arjan van de Ven
2009-09-21 7:41 ` Mike Galbraith
2009-09-21 7:47 ` Mike Galbraith
2009-09-21 2:59 ` Ulrich Lukas
[not found] <dmlhK-6ws-5@gated-at.bofh.it>
[not found] ` <dmnMy-8tg-7@gated-at.bofh.it>
2009-09-20 18:51 ` Sanjoy Mahajan
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