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authorChristoph Hellwig <hch@infradead.org>2011-12-07 01:58:18 +0400
committerBen Myers <bpm@sgi.com>2011-12-15 02:32:21 +0400
commit92678554abfc2a2f2727ad168da87d8d434ac904 (patch)
tree082b395f587dca7903c083e8e10529be1890dc4e /fs/xfs/xfs_quota.h
parentbe7ffc38a80a78e6b68d0f51fae8e8d57b55324c (diff)
downloadlinux-92678554abfc2a2f2727ad168da87d8d434ac904.tar.xz
xfs: flatten the dquot lock ordering
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@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_quota.h')
-rw-r--r--fs/xfs/xfs_quota.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index 487653ddbef0..b86c62f5eeba 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -87,6 +87,7 @@ typedef struct xfs_dqblk {
#define XFS_DQ_PROJ 0x0002 /* project quota */
#define XFS_DQ_GROUP 0x0004 /* a group quota */
#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
+#define XFS_DQ_FREEING 0x0010 /* dquot is beeing torn down */
#define XFS_DQ_ALLTYPES (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
@@ -94,7 +95,8 @@ typedef struct xfs_dqblk {
{ XFS_DQ_USER, "USER" }, \
{ XFS_DQ_PROJ, "PROJ" }, \
{ XFS_DQ_GROUP, "GROUP" }, \
- { XFS_DQ_DIRTY, "DIRTY" }
+ { XFS_DQ_DIRTY, "DIRTY" }, \
+ { XFS_DQ_FREEING, "FREEING" }
/*
* In the worst case, when both user and group quotas are on,