1 files changed, 6 insertions, 1 deletions

diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 8bfb974f0772..1c2e52b2d926 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -43,6 +43,7 @@ typedef enum {
 #define XBF_READ         (1 << 0) /* buffer intended for reading from device */
 #define XBF_WRITE        (1 << 1) /* buffer intended for writing to device */
 #define XBF_READ_AHEAD   (1 << 2) /* asynchronous read-ahead */
+#define XBF_NO_IOACCT    (1 << 3) /* bypass I/O accounting (non-LRU bufs) */
 #define XBF_ASYNC        (1 << 4) /* initiator will not wait for completion */
 #define XBF_DONE         (1 << 5) /* all pages in the buffer uptodate */
 #define XBF_STALE        (1 << 6) /* buffer has been staled, do not find it */
@@ -62,6 +63,7 @@ typedef enum {
 #define _XBF_KMEM        (1 << 21)/* backed by heap memory */
 #define _XBF_DELWRI_Q    (1 << 22)/* buffer on a delwri queue */
 #define _XBF_COMPOUND    (1 << 23)/* compound buffer */
+#define _XBF_IN_FLIGHT   (1 << 25) /* I/O in flight, for accounting purposes */
 
 typedef unsigned int xfs_buf_flags_t;
 
@@ -81,7 +83,8 @@ typedef unsigned int xfs_buf_flags_t;
         { _XBF_PAGES,           "PAGES" }, \
         { _XBF_KMEM,            "KMEM" }, \
         { _XBF_DELWRI_Q,        "DELWRI_Q" }, \
-        { _XBF_COMPOUND,        "COMPOUND" }
+        { _XBF_COMPOUND,        "COMPOUND" }, \
+        { _XBF_IN_FLIGHT,       "IN_FLIGHT" }
 
 
 /*
@@ -115,6 +118,8 @@ typedef struct xfs_buftarg {
         /* LRU control structures */
         struct shrinker         bt_shrinker;
         struct list_lru         bt_lru;
+
+        struct percpu_counter   bt_io_count;
 } xfs_buftarg_t;
 
 struct xfs_buf;