diff options
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 8e0813ddf72a..77d34a61bb58 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -662,6 +662,11 @@ static int __send_command(struct drbd_connection *connection, int vnr, msg_flags); if (data && !err) err = drbd_send_all(connection, sock->socket, data, size, 0); + /* DRBD protocol "pings" are latency critical. + * This is supposed to trigger tcp_push_pending_frames() */ + if (!err && (cmd == P_PING || cmd == P_PING_ACK)) + drbd_tcp_nodelay(sock->socket); + return err; } |