On Thu, 8 Sep 2022 15:09:37 +0200, Jan Kara wrote:
> When __sbq_wake_up() decrements wait_cnt to 0 but races with someone
> else waking the waiter on the waitqueue (so the waitqueue becomes
> empty), it exits without reseting wait_cnt to wake_batch number. Once
> wait_cnt is 0, nobody will ever reset the wait_cnt or wake the new
> waiters resulting in possible deadlocks or busyloops. Fix the problem by
> making sure we reset wait_cnt even if we didn't wake up anybody in the
> end.
>
> [...]
Applied, thanks!
[1/1] sbitmap: Avoid leaving waitqueue in invalid state in __sbq_wake_up()
commit: 48c033314f372478548203c583529f53080fd078
Best regards,
--
Jens Axboe
