3.18-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit 9848b6ddd8c92305252f94592c5e278574e7a6ac ]
If you try to promote a Secondary while connected to a Primary and allow-two-primaries is NOT set, we will wait for "ping-timeout" to give this node a chance to detect a dead primary, in case the cluster manager noticed faster than we did.
But if we then are *still* connected to a Primary, we fail (after an additional timeout of ping-timout).
This change skips the spurious second timeout.
Most people won't notice really, since "ping-timeout" by default is half a second.
But in some installations, ping-timeout may be 10 or 20 seconds or more, and spuriously delaying the error return becomes annoying.
Signed-off-by: Lars Ellenberg lars.ellenberg@linbit.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/block/drbd/drbd_nl.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 1cd47df44bda..591d309b005e 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -632,14 +632,15 @@ drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int for if (rv == SS_TWO_PRIMARIES) { /* Maybe the peer is detected as dead very soon... retry at most once more in this case. */ - int timeo; - rcu_read_lock(); - nc = rcu_dereference(connection->net_conf); - timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; - rcu_read_unlock(); - schedule_timeout_interruptible(timeo); - if (try < max_tries) + if (try < max_tries) { + int timeo; try = max_tries - 1; + rcu_read_lock(); + nc = rcu_dereference(connection->net_conf); + timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; + rcu_read_unlock(); + schedule_timeout_interruptible(timeo); + } continue; } if (rv < SS_SUCCESS) {