xfs: connect up buffer reclaim priority hooks

Now that the buffer reclaim infrastructure can handle different reclaim
priorities for different types of buffers, reconnect the hooks in the
XFS code that has been sitting dormant since it was ported to Linux. This
should finally give use reclaim prioritisation that is on a par with the
functionality that Irix provided XFS 15 years ago.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

1 files changed, 8 insertions, 2 deletions

diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index 4601eabd0da..a76c2428faf 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -336,9 +336,15 @@ void xfs_buf_stale(struct xfs_buf *bp);
 #define XFS_BUF_SIZE(bp)                ((bp)->b_buffer_length)
 #define XFS_BUF_SET_SIZE(bp, cnt)       ((bp)->b_buffer_length = (cnt))
 
-#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)    do { } while (0)
+static inline void
+xfs_buf_set_ref(
+        struct xfs_buf  *bp,
+        int             lru_ref)
+{
+        atomic_set(&bp->b_lru_ref, lru_ref);
+}
+#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)    xfs_buf_set_ref(bp, ref)
 #define XFS_BUF_SET_VTYPE(bp, type)             do { } while (0)
-#define XFS_BUF_SET_REF(bp, ref)                do { } while (0)
 
 #define XFS_BUF_ISPINNED(bp)    atomic_read(&((bp)->b_pin_count))