drbd: Broadcast sync progress no more often than once per second

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

4 files changed, 13 insertions, 2 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 057ffed6eb7e..784f4eb2ed61 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -965,6 +965,7 @@ struct drbd_conf {
         unsigned long rs_mark_time[DRBD_SYNC_MARKS];
         /* current index into rs_mark_{left,time} */
         int rs_last_mark;
+        unsigned long rs_last_bcast; /* [unit jiffies] */
 
         /* where does the admin want us to start? (sector) */
         sector_t ov_start_sector;
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 298dd3e35e02..d339a2754a85 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -3295,6 +3295,12 @@ void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib)
         unsigned seq;
         int err = -ENOMEM;
 
+        if (sib->sib_reason == SIB_SYNC_PROGRESS &&
+            time_after(jiffies, mdev->rs_last_bcast + HZ))
+                mdev->rs_last_bcast = jiffies;
+        else
+                return;
+
         seq = atomic_inc_return(&drbd_genl_seq);
         msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
         if (!msg)
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 64a7305c678a..424dc7bdf9b7 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1696,6 +1696,10 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
         write_unlock_irq(&global_state_lock);
 
         if (r == SS_SUCCESS) {
+                /* reset rs_last_bcast when a resync or verify is started,
+                 * to deal with potential jiffies wrap. */
+                mdev->rs_last_bcast = jiffies - HZ;
+
                 dev_info(DEV, "Began resync as %s (will sync %lu KB [%lu bits set]).\n",
                      drbd_conn_str(ns.conn),
                      (unsigned long) mdev->rs_total << (BM_BLOCK_SHIFT-10),
diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index 0b93e5e2e064..0c5a18ec322c 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -52,8 +52,8 @@
 #endif
 
 extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.3.11"
-#define API_VERSION 88
+#define REL_VERSION "8.4.2"
+#define API_VERSION 1
 #define PRO_VERSION_MIN 86
 #define PRO_VERSION_MAX 101