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authorPeter Leckie <pleckie@sgi.com>2008-10-30 02:05:04 -0400
committerLachlan McIlroy <lachlan@sgi.com>2008-10-30 02:05:04 -0400
commitbc3048e3cd3806ccfd5b16b1a30e5d6013abbd3d (patch)
treec6e27010cb66cc52f41bc696def885cb672fb61f /fs/xfs/quota/xfs_dquot.h
parentd112f2984592acb774187b3adddc107fb0825500 (diff)
[XFS] Clean up dquot pincount code.
This is a code cleanup and optimization that removes a per mount point spinlock from the quota code and cleans up the code. The patch changes the pincount from being an int protected by a spinlock to an atomic_t allowing the pincount to be manipulated without holding the spinlock. This cleanup also protects against random wakup's of both the aild and xfssyncd by reevaluating the pincount after been woken. Two latter patches will address the Spurious wakeups. SGI-PV: 986789 SGI-Modid: xfs-linux-melb:xfs-kern:32215a Signed-off-by: Peter Leckie <pleckie@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <david@fromorbit.com> Signed-off-by: Donald Douwsma <donaldd@sgi.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/quota/xfs_dquot.h')
-rw-r--r--fs/xfs/quota/xfs_dquot.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/quota/xfs_dquot.h b/fs/xfs/quota/xfs_dquot.h
index 8958d0faf8d3..7e455337e2ba 100644
--- a/fs/xfs/quota/xfs_dquot.h
+++ b/fs/xfs/quota/xfs_dquot.h
@@ -83,8 +83,8 @@ typedef struct xfs_dquot {
83 xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */ 83 xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */
84 mutex_t q_qlock; /* quota lock */ 84 mutex_t q_qlock; /* quota lock */
85 struct completion q_flush; /* flush completion queue */ 85 struct completion q_flush; /* flush completion queue */
86 uint q_pincount; /* pin count for this dquot */ 86 atomic_t q_pincount; /* dquot pin count */
87 sv_t q_pinwait; /* sync var for pinning */ 87 wait_queue_head_t q_pinwait; /* dquot pinning wait queue */
88#ifdef XFS_DQUOT_TRACE 88#ifdef XFS_DQUOT_TRACE
89 struct ktrace *q_trace; /* trace header structure */ 89 struct ktrace *q_trace; /* trace header structure */
90#endif 90#endif