xfs: unregister inode shrinker before freeing filesystem structures
authorDave Chinner <dchinner@redhat.com>
Fri, 25 Jun 2010 01:08:40 +0000 (11:08 +1000)
committerAlex Elder <aelder@sgi.com>
Mon, 26 Jul 2010 18:16:45 +0000 (13:16 -0500)
commit2727ccc950ae17375b15005403e1c35ba8fec1df
tree7e405f93bc25589e8506701f73da8344f2856907
parentcca28fb83d9e60779bb348edc33a62068e5f04a4
xfs: unregister inode shrinker before freeing filesystem structures

Currently we don't remove the XFS mount from the shrinker list until
late in the unmount path. By this time, we have already torn down
the internals of the filesystem (e.g. the per-ag structures), and
hence if the shrinker is executed between the teardown and the
unregistering, the shrinker will get NULL per-ag structure pointers
and panic trying to dereference them.

Fix this by removing the xfs mount from the shrinker list before
tearing down it's internal structures.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
fs/xfs/linux-2.6/xfs_super.c