If there are processes still in the wait queue, keep draining, otherwise these processes would be in D state forever. I noticed this situation: q->rq.count[0] == 0, q->rq.count[1] == 0, however wait queue q->rq.wait[0].task_list and q->rq.wait[1].task_list are not empty. Cc: Jens Axboe <axboe@xxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: linux-fsdevel@xxxxxxxxxxxxxxx Signed-off-by: Asias He <asias@xxxxxxxxxx> --- block/blk-core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/blk-core.c b/block/blk-core.c index ca42fd7..2c2b585 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -394,6 +394,7 @@ void blk_drain_queue(struct request_queue *q, bool drain_all) drain |= q->rq.count[i]; drain |= q->in_flight[i]; drain |= !list_empty(&q->flush_queue[i]); + drain |= waitqueue_active(&q->rq.wait[i]); } } -- 1.7.10.1 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
