On 3/5/21 7:14 AM, John Garry wrote:
diff --git a/block/blk.h b/block/blk.h index 3b53e44b967e..1a948bfd91e4 100644 --- a/block/blk.h +++ b/block/blk.h @@ -201,10 +201,29 @@ void elv_unregister_queue(struct request_queue *q); static inline void elevator_exit(struct request_queue *q, struct elevator_queue *e) { + struct blk_mq_tag_set *set = q->tag_set; + struct request_queue *tmp; + lockdep_assert_held(&q->sysfs_lock);+ mutex_lock(&set->tag_list_lock);+ list_for_each_entry(tmp, &set->tag_list, tag_set_list) { + if (tmp == q) + continue; + blk_mq_freeze_queue(tmp); + blk_mq_quiesce_queue(tmp); + } + blk_mq_sched_free_requests(q); __elevator_exit(q, e); + + list_for_each_entry(tmp, &set->tag_list, tag_set_list) { + if (tmp == q) + continue; + blk_mq_unquiesce_queue(tmp); + blk_mq_unfreeze_queue(tmp); + } + mutex_unlock(&set->tag_list_lock); }
Reviewed-by: Bart Van Assche <bvanass...@acm.org>
