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| author | Peter Leckie <pleckie@sgi.com> | 2008-10-30 17:05:04 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 17:05:04 +1100 |
| commit | bc3048e3cd3806ccfd5b16b1a30e5d6013abbd3d (patch) | |
| tree | c6e27010cb66cc52f41bc696def885cb672fb61f /fs/xfs/quota/xfs_dquot.c | |
| parent | d112f2984592acb774187b3adddc107fb0825500 (diff) | |
| download | linux-stable-bc3048e3cd3806ccfd5b16b1a30e5d6013abbd3d.tar.gz linux-stable-bc3048e3cd3806ccfd5b16b1a30e5d6013abbd3d.tar.bz2 linux-stable-bc3048e3cd3806ccfd5b16b1a30e5d6013abbd3d.zip | |
[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.c')
| -rw-r--r-- | fs/xfs/quota/xfs_dquot.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c index f2705f2fd43c..d3f4fbbe2480 100644 --- a/fs/xfs/quota/xfs_dquot.c +++ b/fs/xfs/quota/xfs_dquot.c @@ -101,7 +101,7 @@ xfs_qm_dqinit( if (brandnewdquot) { dqp->dq_flnext = dqp->dq_flprev = dqp; mutex_init(&dqp->q_qlock); - sv_init(&dqp->q_pinwait, SV_DEFAULT, "pdq"); + init_waitqueue_head(&dqp->q_pinwait); /* * Because we want to use a counting completion, complete @@ -131,7 +131,7 @@ xfs_qm_dqinit( dqp->q_res_bcount = 0; dqp->q_res_icount = 0; dqp->q_res_rtbcount = 0; - dqp->q_pincount = 0; + atomic_set(&dqp->q_pincount, 0); dqp->q_hash = NULL; ASSERT(dqp->dq_flnext == dqp->dq_flprev); @@ -1489,7 +1489,7 @@ xfs_qm_dqpurge( "xfs_qm_dqpurge: dquot %p flush failed", dqp); xfs_dqflock(dqp); } - ASSERT(dqp->q_pincount == 0); + ASSERT(atomic_read(&dqp->q_pincount) == 0); ASSERT(XFS_FORCED_SHUTDOWN(mp) || !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL)); |