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authorChristoph Hellwig <hch@infradead.org>2012-07-04 19:13:32 +0400
committerBen Myers <bpm@sgi.com>2012-07-30 01:22:20 +0400
commit5a15322da1a51ad8f3af1962de355885b6c606f2 (patch)
tree49f527ed442fd504feb2f92d340ba8b6b56ef0b4 /fs/xfs/xfs_vnodeops.c
parent0b56185b0d64ef89dad1c85bb7403fa762cbe50d (diff)
downloadlinux-5a15322da1a51ad8f3af1962de355885b6c606f2.tar.xz
xfs: avoid the iolock in xfs_free_eofblocks for evicted inodes
Same rational as the last patch - these inodes are not reachable, so don't bother with locking. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Rich Johnston <rjohnston@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 79270430dafc..2a5c637344b4 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -146,11 +146,6 @@ xfs_readlink(
}
/*
- * Flags for xfs_free_eofblocks
- */
-#define XFS_FREE_EOF_TRYLOCK (1<<0)
-
-/*
* This is called by xfs_inactive to free any blocks beyond eof
* when the link count isn't zero and by xfs_dm_punch_hole() when
* punching a hole to EOF.
@@ -159,7 +154,7 @@ STATIC int
xfs_free_eofblocks(
xfs_mount_t *mp,
xfs_inode_t *ip,
- int flags)
+ bool need_iolock)
{
xfs_trans_t *tp;
int error;
@@ -201,13 +196,11 @@ xfs_free_eofblocks(
*/
tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
- if (flags & XFS_FREE_EOF_TRYLOCK) {
+ if (need_iolock) {
if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
xfs_trans_cancel(tp, 0);
return 0;
}
- } else {
- xfs_ilock(ip, XFS_IOLOCK_EXCL);
}
error = xfs_trans_reserve(tp, 0,
@@ -217,7 +210,8 @@ xfs_free_eofblocks(
if (error) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
xfs_trans_cancel(tp, 0);
- xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ if (need_iolock)
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
return error;
}
@@ -244,7 +238,10 @@ xfs_free_eofblocks(
error = xfs_trans_commit(tp,
XFS_TRANS_RELEASE_LOG_RES);
}
- xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL);
+
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ if (need_iolock)
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
}
return error;
}
@@ -466,8 +463,7 @@ xfs_release(
if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE))
return 0;
- error = xfs_free_eofblocks(mp, ip,
- XFS_FREE_EOF_TRYLOCK);
+ error = xfs_free_eofblocks(mp, ip, true);
if (error)
return error;
@@ -524,7 +520,7 @@ xfs_inactive(
(!(ip->i_d.di_flags &
(XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
ip->i_delayed_blks != 0))) {
- error = xfs_free_eofblocks(mp, ip, 0);
+ error = xfs_free_eofblocks(mp, ip, false);
if (error)
return VN_INACTIVE_CACHE;
}