On Mon, 13 May 2024 20:57:44 +0800 Sam Sun <samsun1006219@xxxxxxxxx> > > I am happy to help testing patches. As Thanks. > for repro, I have a C repro available, but it is too long so that I > attached it to the first email. Should I just paste repro with bug > report? Yes. > I applied this patch and tried using the C repro, but it still crashed > with the same task hang kernel dump log. Oh low-hanging pear is sour, and try again seeing if there is missing wakeup due to wake batch. --- x/lib/sbitmap.c +++ y/lib/sbitmap.c @@ -579,6 +579,8 @@ void sbitmap_queue_wake_up(struct sbitma unsigned int wake_batch = READ_ONCE(sbq->wake_batch); unsigned int wakeups; + __sbitmap_queue_wake_up(sbq, nr); + if (!atomic_read(&sbq->ws_active)) return; --
