LU-12328 flr: preserve last read mirror

[fs/lustre-release.git] / lustre / lov / lov_cl_internal.h

diff --git a/lustre/lov/lov_cl_internal.h b/lustre/lov/lov_cl_internal.h
index a72d455..7249f88 100644 (file)
--- a/lustre/lov/lov_cl_internal.h
+++ b/lustre/lov/lov_cl_internal.h
@@ -312,8 +312,15 @@ struct lov_object {
                         */
                        int             lo_preferred_mirror;
                        /**
+                        * The last mirror that has been read successfully.
+                        * This field is maintained so that subsequent read
+                        * can take the advantage of last retries and avoid
+                        * reading some unavailable OSTs.
+                        */
+                       int             lo_last_read_mirror;
+                       /**
                         * For FLR: the lock to protect access to
-                        * lo_preferred_mirror.
+                        * lo_last_read_mirror.
                         */
                        spinlock_t      lo_write_lock;
                        /**