Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / drivers / md / raid1.h

diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h
index 331a98a231b4e3a3dff585055655f065c0f68de9..9bebca7bff2fbc4ec4780031190e6666f7abf56d 100644 (file)
--- a/drivers/md/raid1.h
+++ b/drivers/md/raid1.h
@@ -41,6 +41,19 @@ struct r1conf {
         */
        sector_t                next_resync;
 
+       /* When raid1 starts resync, we divide array into four partitions
+        * |---------|--------------|---------------------|-------------|
+        *        next_resync   start_next_window       end_window
+        * start_next_window = next_resync + NEXT_NORMALIO_DISTANCE
+        * end_window = start_next_window + NEXT_NORMALIO_DISTANCE
+        * current_window_requests means the count of normalIO between
+        *   start_next_window and end_window.
+        * next_window_requests means the count of normalIO after end_window.
+        * */
+       sector_t                start_next_window;
+       int                     current_window_requests;
+       int                     next_window_requests;
+
        spinlock_t              device_lock;
 
        /* list of 'struct r1bio' that need to be processed by raid1d,
@@ -112,6 +125,7 @@ struct r1bio {
                                                 * in this BehindIO request
                                                 */
        sector_t                sector;
+       sector_t                start_next_window;
        int                     sectors;
        unsigned long           state;
        struct mddev            *mddev;