| Message ID | 1524503065-24623-3-git-send-email-idryomov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index 02c441c12c38..21ac6e3b96bb 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -1133,6 +1133,7 @@ static void finish_hunting(struct ceph_mon_client *monc) monc->hunting = false; monc->had_a_connection = true; un_backoff(monc); + __schedule_delayed(monc); } }
If we go without an established session for a while, backoff delay will climb to 30 seconds. The keepalive timeout is also 30 seconds, so it's pretty easily hit after a prolonged hunting for a monitor: we don't get a chance to send out a keepalive in time, which means we never get back a keepalive ack in time, cutting an established session and attempting to connect to a different monitor every 30 seconds: [Sun Apr 1 23:37:05 2018] libceph: mon0 10.80.20.99:6789 session established [Sun Apr 1 23:37:36 2018] libceph: mon0 10.80.20.99:6789 session lost, hunting for new mon [Sun Apr 1 23:37:36 2018] libceph: mon2 10.80.20.103:6789 session established [Sun Apr 1 23:38:07 2018] libceph: mon2 10.80.20.103:6789 session lost, hunting for new mon [Sun Apr 1 23:38:07 2018] libceph: mon1 10.80.20.100:6789 session established [Sun Apr 1 23:38:37 2018] libceph: mon1 10.80.20.100:6789 session lost, hunting for new mon [Sun Apr 1 23:38:37 2018] libceph: mon2 10.80.20.103:6789 session established [Sun Apr 1 23:39:08 2018] libceph: mon2 10.80.20.103:6789 session lost, hunting for new mon The regular keepalive interval is 10 seconds. After ->hunting is cleared in finish_hunting(), call __schedule_delayed() to ensure we send out a keepalive after 10 seconds. Cc: stable@vger.kernel.org # 4.7+ Link: http://tracker.ceph.com/issues/23537 Signed-off-by: Ilya Dryomov <idryomov@gmail.com> --- net/ceph/mon_client.c | 1 + 1 file changed, 1 insertion(+)