From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 16312] WARNING: at fs/fs-writeback.c:1127 __mark_inode_dirty
Date: Thu, 16 Sep 2010 18:13:21 GMT
Message-ID: <201009161813.o8GIDLJl011203@demeter2.kernel.org>
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--- Comment #30 from Jan Kara 2010-09-16 18:13:21 ---
OK, Tejun, I finally read the code. So you are right that the patch doesn't
solve the race. The race seems to be in block/genhd.c:add_disk(). Once we call
register_disk(), device can be successfully opened (get_gendisk() from
blkdev_open() will succeed as soon as disk's kobject exists). But until we call
bdi_register_dev(), backing dev isn't properly initialized and thus can see the
warning. This also explains why Larry is able to see the warning even with your
patch.
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