xfs: stop using xfs_trans_iget in the RT allocator
During mount we establish references to the RT inodes, which we keep for
the lifetime of the filesystem. Instead of using xfs_trans_iget to grab
additional references when adding RT inodes to transactions use the
combination of xfs_ilock and xfs_trans_ijoin_ref, which archives the same
end result with less overhead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index d8d0906..e7b441d 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -2333,7 +2333,6 @@
xfs_extlen_t prod = 0; /* product factor for allocators */
xfs_extlen_t ralen = 0; /* realtime allocation length */
xfs_extlen_t align; /* minimum allocation alignment */
- xfs_inode_t *ip; /* bitmap incore inode */
xfs_rtblock_t rtb;
mp = ap->ip->i_mount;
@@ -2370,11 +2369,8 @@
/*
* Lock out other modifications to the RT bitmap inode.
*/
- error = xfs_trans_iget(mp, ap->tp, mp->m_sb.sb_rbmino, 0,
- XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP, &ip);
- if (error)
- return error;
- ASSERT(ip == mp->m_rbmip);
+ xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin_ref(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
/*
* If it's an allocation to an empty file at offset 0,