drbd: Reduce the time an empty resync takes usually

This mitigates changes introduced with commit:
http://git.drbd.org/?p=drbd-8.3.git;a=commit;h=4b6803a3276652da3737

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

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index d803e6c257e2..ed9f1de24a71 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -4074,6 +4074,8 @@ static int got_PingAck(struct drbd_conf *mdev, struct p_header *h)
 {
         /* restore idle timeout */
         mdev->meta.socket->sk->sk_rcvtimeo = mdev->net_conf->ping_int*HZ;
+        if (!test_and_set_bit(GOT_PING_ACK, &mdev->flags))
+                wake_up(&mdev->misc_wait);
 
         return TRUE;
 }