提交 64e7ea87 编写于 作者: J Josef Bacik 提交者: Jens Axboe

rq-qos: don't reset has_sleepers on spurious wakeups

If we raced with somebody else getting an inflight counter we could fail
to get an inflight counter with no sleepers on the list, and thus need
to go to sleep.  In this case has_sleepers should be true because we are
now relying on the waker to get our inflight counter for us.  And in the
case of spurious wakeups we'd still want this to be the case.  So set
has_sleepers to true if we went to sleep to make sure we're woken up the
proper way.
Reviewed-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NJosef Bacik <josef@toxicpanda.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
上级 545fbd07
......@@ -261,7 +261,7 @@ void rq_qos_wait(struct rq_wait *rqw, void *private_data,
break;
}
io_schedule();
has_sleeper = false;
has_sleeper = true;
} while (1);
finish_wait(&rqw->wait, &data.wq);
}
......
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