Hey, Daniel,
I'm just getting around to looking at this. One thing jumped out at me:
> + if (bio->bi_throttle) {
> + struct request_queue *q = bio->bi_queue;
> + bio->bi_throttle = 0; /* or detect multiple endio and err? */
> + atomic_add(bio->bi_throttle, &q->available);
> + wake_up(&q->throttle_wait);
> + }
I'm feeling like I must be really dumb, but...how can that possibly
work? You're zeroing >bi_throttle before adding it back into
q->available, so the latter will never increase...
jon
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