| From | alexander.levin@verizon ... | Subject | [PATCH AUTOSEL for 4.14 27/64] block: wake up all tasks blocked in get_request() | Date | Sat, 2 Dec 2017 15:51:26 +0000 |
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From: Ming Lei <ming.lei@redhat.com>
[ Upstream commit 34d9715ac1edd50285168dd8d80c972739a4f6a4 ]
Once blk_set_queue_dying() is done in blk_cleanup_queue(), we call blk_freeze_queue() and wait for q->q_usage_counter becoming zero. But if there are tasks blocked in get_request(), q->q_usage_counter can never become zero. So we have to wake up all these tasks in blk_set_queue_dying() first.
Fixes: 3ef28e83ab157997 ("block: generic request_queue reference counting") Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- block/blk-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c index 33ee583cfe45..516ce3174683 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -605,8 +605,8 @@ void blk_set_queue_dying(struct request_queue *q) spin_lock_irq(q->queue_lock); blk_queue_for_each_rl(rl, q) { if (rl->rq_pool) { - wake_up(&rl->wait[BLK_RW_SYNC]); - wake_up(&rl->wait[BLK_RW_ASYNC]); + wake_up_all(&rl->wait[BLK_RW_SYNC]); + wake_up_all(&rl->wait[BLK_RW_ASYNC]); } } spin_unlock_irq(q->queue_lock); -- 2.11.0
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