diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-11-30 14:33:25 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-11-30 14:33:25 +1100 |
| commit | 6552321831dce87ff5c466a55b58d472732caadc (patch) | |
| tree | 84f3de7b89690c84fd13e2efa7a85d4918d342e3 /fs/xfs/xfs_symlink.c | |
| parent | f8319483f57f1ca22370f4150bb990aca7728a67 (diff) | |
| download | linux-6552321831dce87ff5c466a55b58d472732caadc.tar.bz2 | |
xfs: remove i_iolock and use i_rwsem in the VFS inode instead
This patch drops the XFS-own i_iolock and uses the VFS i_rwsem which
recently replaced i_mutex instead. This means we only have to take
one lock instead of two in many fast path operations, and we can
also shrink the xfs_inode structure. Thanks to the xfs_ilock family
there is very little churn, the only thing of note is that we need
to switch to use the lock_two_directory helper for taking the i_rwsem
on two inodes in a few places to make sure our lock order matches
the one used in the VFS.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_symlink.c')
| -rw-r--r-- | fs/xfs/xfs_symlink.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c index 58142aeeeea6..f2cb45ed1d54 100644 --- a/fs/xfs/xfs_symlink.c +++ b/fs/xfs/xfs_symlink.c @@ -238,8 +238,7 @@ xfs_symlink( if (error) goto out_release_inode; - xfs_ilock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL | - XFS_IOLOCK_PARENT | XFS_ILOCK_PARENT); + xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); unlock_dp_on_error = true; /* @@ -287,7 +286,7 @@ xfs_symlink( * the transaction cancel unlocking dp so don't do it explicitly in the * error path. */ - xfs_trans_ijoin(tp, dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); + xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); unlock_dp_on_error = false; /* @@ -412,7 +411,7 @@ out_release_inode: xfs_qm_dqrele(pdqp); if (unlock_dp_on_error) - xfs_iunlock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); + xfs_iunlock(dp, XFS_ILOCK_EXCL); return error; } |