pdflush uses all cpu-time with 2.6.7 and slow media
From: Georg Chini (georg.chini_at_triaton-webhosting.com)
Date: 06/30/04
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Date: Wed, 30 Jun 2004 11:55:46 +0200 To: linux-kernel@vger.kernel.org
Hello,
there seems to be a problem with pdflush and
slow media in 2.6.7. I'm using the packet-writing patch
maintained by Peter Osterlund to write to dvd+rw.
When I copy large files to the dvd, pdflush
starts using all cpu-time up to a point where
the system hangs completely. I found a posting here
with a similar problem concerning nfs and pdflush
(28.04.2004, Brent Cook). This thread mentions,
that the problem is not observable in 2.6.5.
So I tried 2.6.5 and everything works fine if
I set dirty_ratio in /proc/sys/vm to 15. With
the default value of 40 there are still some problems,
but it is way better than 2.6.7-bk12. BTW my machine
is a dual PIII.
Any idea what might cause the problem? Any more
information I should give?
As I'm not on the list, please CC to me in your replies.
Thanks in advance
Georg Chini
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- Previous message: Povolotsky, Alexander: "Preemption of the OS system call due to expiration of the time-sl ice for: a) SCHED_NORMAL (aka SCHED_OTHER) b) SCHED_RR"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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