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authorChristoph Hellwig <hch@infradead.org>2011-12-18 20:00:10 +0000
committerBen Myers <bpm@sgi.com>2012-01-17 15:07:54 -0600
commitf392e6319a4e9a028b0c8b48f000bb01d660ad53 (patch)
tree6cf97bebb841da303056b60da087e76cc087af9b /fs/xfs/xfs_inode.h
parent474fce067521a40dbacc722e8ba119e81c2d31bf (diff)
xfs: replace i_pin_wait with a bit waitqueue
Replace i_pin_wait, which is only used during synchronous inode flushing with a bit waitqueue. This trades off a much smaller inode against slightly slower wakeup performance, and saves 12 (32-bit) or 20 (64-bit) bytes in the XFS inode. Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_inode.h')
-rw-r--r--fs/xfs/xfs_inode.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 960d2a89b3a..4acbe740be4 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -238,7 +238,6 @@ typedef struct xfs_inode {
mrlock_t i_lock; /* inode lock */
mrlock_t i_iolock; /* inode IO lock */
atomic_t i_pincount; /* inode pin count */
- wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
spinlock_t i_flags_lock; /* inode i_flags lock */
/* Miscellaneous state. */
unsigned long i_flags; /* see defined flags below */
@@ -367,6 +366,8 @@ xfs_set_projid(struct xfs_inode *ip,
#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
#define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
#define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
+#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
+#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
/*
* Per-lifetime flags need to be reset when re-using a reclaimable inode during