diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-11-30 04:33:25 +0100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-11-30 04:33:25 +0100 |
| commit | 6552321831dce87ff5c466a55b58d472732caadc (patch) | |
| tree | 84f3de7b89690c84fd13e2efa7a85d4918d342e3 /fs/xfs/xfs_pnfs.c | |
| parent | locking/lockdep: Provide a type check for lock_is_held (diff) | |
| download | linux-6552321831dce87ff5c466a55b58d472732caadc.tar.xz linux-6552321831dce87ff5c466a55b58d472732caadc.zip | |
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_pnfs.c')
| -rw-r--r-- | fs/xfs/xfs_pnfs.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c index 93a7aafa56d6..2f2dc3c09ad0 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -32,8 +32,7 @@ int xfs_break_layouts( struct inode *inode, - uint *iolock, - bool with_imutex) + uint *iolock) { struct xfs_inode *ip = XFS_I(inode); int error; @@ -42,12 +41,8 @@ xfs_break_layouts( while ((error = break_layout(inode, false) == -EWOULDBLOCK)) { xfs_iunlock(ip, *iolock); - if (with_imutex && (*iolock & XFS_IOLOCK_EXCL)) - inode_unlock(inode); error = break_layout(inode, true); *iolock = XFS_IOLOCK_EXCL; - if (with_imutex) - inode_lock(inode); xfs_ilock(ip, *iolock); } |