[patch 12/19] xfs: flatten the dquot lock ordering

[Dave Chinner]

On Tue, Dec 06, 2011 at 04:58:18PM -0500, Christoph Hellwig wrote:
> Introduce a new XFS_DQ_FREEING flag that tells lookup and mplist walks
> to skip a dquot that is beeing freed, and use this avoid the trylock
> on the hash and mplist locks in xfs_qm_dqreclaim_one.  Also simplify
> xfs_dqpurge by moving the inodes to a dispose list after marking them
> XFS_DQ_FREEING and avoid the locker ordering constraints.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Looks good to me withthe coment updates.

Reviewed-by: Dave Chinner <dchinner at redhat.com>

-- 
Dave Chinner
david at fromorbit.com