From 12c75e20a269ac917f4a76936d7142264e522233 Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Mon, 27 Jul 2020 21:47:50 +0300 Subject: [PATCH] block/nbd: nbd_co_reconnect_loop(): don't sleep if drained We try to go to wakeable sleep, so that, if drain begins it will break the sleep. But what if nbd_client_co_drain_begin() already called and s->drained is already true? We'll go to sleep, and drain will have to wait for the whole timeout. Let's improve it. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake Message-Id: <20200727184751.15704-5-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake --- block/nbd.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 620c97be6b..7bb881fef4 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -341,8 +341,6 @@ static coroutine_fn void nbd_co_reconnect_loop(BDRVNBDState *s) qemu_co_queue_restart_all(&s->free_sema); } - qemu_co_sleep_ns_wakeable(QEMU_CLOCK_REALTIME, timeout, - &s->connection_co_sleep_ns_state); if (s->drained) { bdrv_dec_in_flight(s->bs); s->wait_drained_end = true; @@ -354,9 +352,12 @@ static coroutine_fn void nbd_co_reconnect_loop(BDRVNBDState *s) qemu_coroutine_yield(); } bdrv_inc_in_flight(s->bs); - } - if (timeout < max_timeout) { - timeout *= 2; + } else { + qemu_co_sleep_ns_wakeable(QEMU_CLOCK_REALTIME, timeout, + &s->connection_co_sleep_ns_state); + if (timeout < max_timeout) { + timeout *= 2; + } } nbd_reconnect_attempt(s); -- 2.11.4.GIT