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authorChristoph Hellwig <hch@infradead.org>2012-07-04 11:13:31 -0400
committerBen Myers <bpm@sgi.com>2012-07-29 16:16:49 -0500
commit0b56185b0d64ef89dad1c85bb7403fa762cbe50d (patch)
treef46b40a37c5a27e4cf0ab9c99241350e679f9930
parentfe67be036ff2f713b1c5f24dd4cdffae75bcb97a (diff)
downloadop-kernel-dev-0b56185b0d64ef89dad1c85bb7403fa762cbe50d.zip
op-kernel-dev-0b56185b0d64ef89dad1c85bb7403fa762cbe50d.tar.gz
xfs: do not take the iolock in xfs_inactive
An inode that enters xfs_inactive has been removed from all global lists but the inode hash, and can't be recycled in xfs_iget before it has been marked reclaimable. Thus taking the iolock in here is not nessecary at all, and given the amount of lockdep false positives it has triggered already I'd rather remove the locking. The only change outside of xfs_inactive is relaxing an assert in xfs_itruncate_extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Rich Johnston <rjohnston@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
-rw-r--r--fs/xfs/xfs_inode.c4
-rw-r--r--fs/xfs/xfs_vnodeops.c29
2 files changed, 15 insertions, 18 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 5c10825..2778258 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1123,7 +1123,9 @@ xfs_itruncate_extents(
int error = 0;
int done = 0;
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL));
+ ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+ ASSERT(!atomic_read(&VFS_I(ip)->i_count) ||
+ xfs_isilocked(ip, XFS_IOLOCK_EXCL));
ASSERT(new_size <= XFS_ISIZE(ip));
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
ASSERT(ip->i_itemp != NULL);
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 9a2ae8c..7927043 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -554,7 +554,7 @@ xfs_inactive(
return VN_INACTIVE_CACHE;
}
- xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
if (S_ISLNK(ip->i_d.di_mode)) {
@@ -591,21 +591,24 @@ xfs_inactive(
ASSERT(ip->i_d.di_forkoff != 0);
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
if (error)
- goto error_unlock;
+ goto out_unlock;
+
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
error = xfs_attr_inactive(ip);
if (error)
- goto error_unlock;
+ goto out;
tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
error = xfs_trans_reserve(tp, 0,
XFS_IFREE_LOG_RES(mp),
0, XFS_TRANS_PERM_LOG_RES,
XFS_INACTIVE_LOG_COUNT);
- if (error)
- goto error_cancel;
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ goto out;
+ }
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
@@ -658,21 +661,13 @@ xfs_inactive(
* Release the dquots held by inode, if any.
*/
xfs_qm_dqdetach(ip);
- xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
-
+out_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
out:
return VN_INACTIVE_CACHE;
out_cancel:
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
- xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
- return VN_INACTIVE_CACHE;
-
-error_cancel:
- ASSERT(XFS_FORCED_SHUTDOWN(mp));
- xfs_trans_cancel(tp, 0);
-error_unlock:
- xfs_iunlock(ip, XFS_IOLOCK_EXCL);
- return VN_INACTIVE_CACHE;
+ goto out_unlock;
}
/*
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