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From: Shaohua Li <shaohua.li@intel.com>
To: lkml <linux-kernel@vger.kernel.org>
Cc: kamezawa.hiroyu@jp.fujitsu.com, clameter@sgi.com
Subject: bug in migrate page
Date: Wed, 22 Aug 2007 10:08:09 +0800	[thread overview]
Message-ID: <1187748489.8474.21.camel@sli10-conroe.sh.intel.com> (raw)

commit dc386d4d1e98bb39fb967ee156cd456c802fc692 adds rcu_read_lock, but
some routines in the lock range might sleep (like lock_buffer,
aops->writepage), I saw a 'sleep in atomic' warning. It appears the
patch has several versions before. Doing rcu_read_lock in PageAnon
sounds break the case of PageAnon(page) && PageSwapCache(page),
as .writepage might be called. The dummy anon patch maybe is ok.

Thanks,
Shaohua

             reply	other threads:[~2007-08-22  2:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-22  2:08 Shaohua Li [this message]
2007-08-22  2:52 ` KAMEZAWA Hiroyuki
2007-08-22  2:50   ` Shaohua Li
2007-08-22  3:06     ` KAMEZAWA Hiroyuki
2007-08-22  5:00     ` [RFC][PATCH][BUGFIX] fix rcu_read_lock in page migraton KAMEZAWA Hiroyuki
2007-08-22 18:44       ` Christoph Lameter
2007-08-22 17:50 ` bug in migrate page Christoph Lameter

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