From 0b56185b0d64ef89dad1c85bb7403fa762cbe50d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 4 Jul 2012 11:13:31 -0400 Subject: 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 Reviewed-by: Rich Johnston Signed-off-by: Ben Myers --- fs/xfs/xfs_inode.c | 4 +++- fs/xfs/xfs_vnodeops.c | 29 ++++++++++++----------------- 2 files changed, 15 insertions(+), 18 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 5c10825f2f80..2778258fcfa2 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 9a2ae8c0ecc4..79270430dafc 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; } /* -- cgit v1.2.1