blk-mq: support batched queue_rqs() on shared tags queue

Since active requests have been accounted when allocate driver tags,
we can remove this limit now.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230913151616.3164338-4-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index c209a7dddee3fc3d93bed164361d91c66a4b7cb2..68ce9357463b94c51ef3933c16a1ee616ce22894 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2781,13 +2781,8 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
                 * If we do, we can dispatch the whole plug list in one go. We
                 * already know at this point that all requests belong to the
                 * same queue, caller must ensure that's the case.
-                *
-                * Since we pass off the full list to the driver at this point,
-                * we do not increment the active request count for the queue.
-                * Bypass shared tags for now because of that.
                 */
-               if (q->mq_ops->queue_rqs &&
-                   !(rq->mq_hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) {
+               if (q->mq_ops->queue_rqs) {
                        blk_mq_run_dispatch_ops(q,
                                __blk_mq_flush_plug_list(q, plug));
                        if (rq_list_empty(plug->mq_list))