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[XFS] move root inode IRELE into xfs_unmountfs 

The root inode is allocated in xfs_mountfs so it should be release in
xfs_unmountfs. For the unmount case that means we do it after the the
xfs_sync(mp, SYNC_WAIT | SYNC_CLOSE) in the forced shutdown case and the
dmapi unmount event. Note that both reference the rip variable which might
be freed by that time in case inode flushing has kicked in, so strictly
speaking this might count as a bug fix

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31830a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-08-13 16:49:04 +10:00 committed by Lachlan McIlroy
parent 3a76c1ea07
commit 77508ec8e6
2 changed files with 2 additions and 4 deletions
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4
fs/xfs/linux-2.6/xfs_super.c
View File

@ -1131,8 +1131,6 @@ xfs_fs_put_super(
error = xfs_unmount_flush(mp, 0);
WARN_ON(error);
IRELE(rip);
/*
* If we're forcing a shutdown, typically because of a media error,
* we want to make sure we invalidate dirty pages that belong to
@ -1804,8 +1802,6 @@ xfs_fs_fill_super(
error = xfs_unmount_flush(mp, 0);
WARN_ON(error);
IRELE(mp->m_rootip);
xfs_unmountfs(mp);
goto out_free_fsname;
}

2
fs/xfs/xfs_mount.c
View File

@ -1250,6 +1250,8 @@ xfs_unmountfs(xfs_mount_t *mp)
__uint64_t resblks;
int error = 0;
IRELE(mp->m_rootip);
/*
* We can potentially deadlock here if we have an inode cluster
* that has been freed has it's buffer still pinned in memory because