[PATCH 8/8] xfs: fix dquot shaker deadlock

[Alex Elder]

On Thu, 2011-01-27 at 14:53 +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> Commit 368e136 ("xfs: remove duplicate code from dquot reclaim") fails
> to unlock the dquot freelist when the number of loop restarts is
> exceeded in xfs_qm_dqreclaim_one(). This causes hangs in memory
> reclaim. Remove the bogus loop exit check that causes the problem.
> 
> Reported-by: Malcolm Scott <lkml at malc.org.uk>
> Signed-off-by: Dave Chinner <dchinner at redhat.com>

Still not a pretty loop (and I have no suggestions
to improve it).  But it looks correct.

Please add a mention in the description that the
double-increment issue in the qi_dqlist_lock case
has been fixed.

Reviewed-by: Alex Elder <aelder at sgi.com>