xfs: pack holes in xfs_defer_ops and xfs_trans

Source kernel commit: 44fd294681de73990da656294e3dacaa7878f577

Both structures have holes due to member alignment. Move dop_low to
the end of xfs_defer ops to sanitize the cache line alignment and
move t_flags to save 8 bytes in xfs_trans.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_defer.h b/libxfs/xfs_defer.h
index 58c979c9f3fadefbff985afd9f7ff383b038e53f..8f58f217fdff668000bb668d80922361dc5f3339 100644 (file)
--- a/libxfs/xfs_defer.h
+++ b/libxfs/xfs_defer.h
@@ -49,13 +49,14 @@ enum xfs_defer_ops_type {
 #define XFS_DEFER_OPS_NR_BUFS  2       /* join up to two buffers */
 
 struct xfs_defer_ops {
-       bool                    dop_low;        /* alloc in low mode */
        struct list_head        dop_intake;     /* unlogged pending work */
        struct list_head        dop_pending;    /* logged pending work */
 
        /* relog these with each roll */
        struct xfs_inode        *dop_inodes[XFS_DEFER_OPS_NR_INODES];
        struct xfs_buf          *dop_bufs[XFS_DEFER_OPS_NR_BUFS];
+
+       bool                    dop_low;        /* alloc in low mode */
 };
 
 void xfs_defer_add(struct xfs_defer_ops *dop, enum xfs_defer_ops_type type,