On Fri, 12 Jan 2024 20:26:26 +0800, Ming Lei wrote:
> In blk_mq_mark_tag_wait(), __add_wait_queue() may be re-ordered
> with the following blk_mq_get_driver_tag() in case of getting driver
> tag failure.
>
> Then in __sbitmap_queue_wake_up(), waitqueue_active() may not observe
> the added waiter in blk_mq_mark_tag_wait() and wake up nothing, meantime
> blk_mq_mark_tag_wait() can't get driver tag successfully.
>
> [...]
Applied, thanks!
[1/1] blk-mq: fix IO hang from sbitmap wakeup race
commit: 5266caaf5660529e3da53004b8b7174cab6374ed
Best regards,
--
Jens Axboe
