From: Chris Mason <mason@suse.com>
To: Johan Ekenberg <johan@ekenberg.se>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
akpm@zip.com.au, jack@suse.cz
Cc: linux-kernel@vger.kernel.org
Subject: Re: Lockups with 2.4.14 and 2.4.16
Date: Fri, 14 Dec 2001 11:49:28 -0500 [thread overview]
Message-ID: <3825380000.1008348567@tiny> (raw)
In-Reply-To: <000a01c1829f$75daf7a0$050010ac@FUTURE>
In-Reply-To: <000a01c1829f$75daf7a0$050010ac@FUTURE>
Ok, Johan sent along stack traces, and the deadlock works a little like this:
linux-2.4.16 + reiserfs + quota v2
kswapd ->
prune_icache->dispose_list->dquot_drop->commit_dquot->generic_file_write->
mark_inode_dirty->journal_begin-> wait for trans to end
Some process in the transaction is waiting on kswapd to free ram.
So, this will hit any journaled FS that uses quotas and logs inodes under
during a write. ext3 doesn't seem to do special things for quota anymore, so
it should be affected too.
The only fix I see is to make sure kswapd doesn't run shrink_icache, and to
have it done via a dedicated daemon instead. Does anyone have a better idea?
-chris
next prev parent reply other threads:[~2001-12-14 16:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-11 23:29 Lockups with 2.4.14 and 2.4.16 Johan Ekenberg
2001-12-11 23:47 ` Alan Cox
2001-12-11 23:56 ` SV: " Johan Ekenberg
2001-12-12 0:36 ` Alan Cox
2001-12-14 16:49 ` Chris Mason [this message]
2001-12-14 17:26 ` Andrew Morton
2001-12-14 17:53 ` Chris Mason
2001-12-14 18:32 ` Andrea Arcangeli
2001-12-14 18:55 ` Chris Mason
2001-12-14 18:57 ` Andrew Morton
2001-12-14 19:16 ` Andrea Arcangeli
2001-12-20 13:29 ` Chris Mason
[not found] ` <1624652704.1008906979@tiny>
[not found] ` <3C22CC54.D4F5B01@zip.com.au>
2001-12-21 13:29 ` [PATCH] " Chris Mason
2001-12-14 19:26 ` Jan Kara
2001-12-14 19:21 ` Jan Kara
2001-12-12 0:56 ` SV: " Johan Ekenberg
2001-12-12 1:22 ` Alan Cox
2001-12-12 0:12 ` Brad Dameron
2001-12-12 0:47 ` Chris Mason
2001-12-12 1:01 ` SV: " Johan Ekenberg
2001-12-12 1:10 ` Hans Reiser
2001-12-12 1:15 ` Chris Mason
-- strict thread matches above, loose matches on Subject: below --
2001-12-12 0:38 Johan Ekenberg
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