From: Rik van Riel <riel@conectiva.com.br>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.redhat.com, linux-mm@kvack.org
Subject: [patch *] VM deadlock fix
Date: Thu, 21 Sep 2000 13:44:35 -0300 (BRST) [thread overview]
Message-ID: <Pine.LNX.4.21.0009211340110.18809-100000@duckman.distro.conectiva> (raw)
Hi,
I've found and fixed the deadlocks in the new VM. They turned out
to be single-cpu only bugs, which explains why they didn't crash my
SMP tesnt box ;)
They have to do with the fact that processes schedule away while
holding IO locks after waking up kswapd. At that point kswapd
spends its time spinning on the IO locks and single-cpu systems
will die...
Due to bad connectivity I'm not attaching this patch but have only
put it online on my home page:
http://www.surriel.com/patches/2.4.0-t9p2-vmpatch
(yes, I'm at a conference now ... the worst beating this patch
has had is a full night in 'make bzImage' with mem=8m)
regards,
Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
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next reply other threads:[~2000-09-21 16:44 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-21 16:44 Rik van Riel [this message]
2000-09-21 20:28 ` Roger Larsson
2000-09-21 23:31 ` Problem remains - page_launder? (Was: Re: [patch *] VM deadlock fix) Roger Larsson
2000-09-21 22:23 ` [patch *] VM deadlock fix David S. Miller
2000-09-22 0:18 ` Andrea Arcangeli
2000-09-21 23:57 ` David S. Miller
2000-09-22 8:39 ` Rik van Riel
2000-09-22 8:54 ` test9-pre5+t9p2-vmpatch VM deadlock during write-intensive workload Molnar Ingo
2000-09-22 9:00 ` Molnar Ingo
2000-09-22 9:08 ` Rik van Riel
2000-09-22 9:14 ` Molnar Ingo
2000-09-22 9:34 ` Molnar Ingo
2000-09-22 10:27 ` Rik van Riel
2000-09-22 13:10 ` André Dahlqvist
2000-09-22 14:10 ` André Dahlqvist
2000-09-22 16:38 ` test9-pre3+t9p2-vmpatch VM deadlock during socket I/O Yuri Pudgorodsky
2000-09-22 16:20 ` test9-pre5+t9p2-vmpatch VM deadlock during write-intensive workload Mohammad A. Haque
2000-09-22 17:39 ` Linus Torvalds
2000-09-25 13:47 ` Rik van Riel
2000-09-22 12:16 ` [patch *] VM deadlock fix Martin Diehl
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