diff options
Diffstat (limited to 'block/blk-mq-sched.c')
| -rw-r--r-- | block/blk-mq-sched.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index fdc129e64cc4..cf9c66c6d35a 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -405,8 +405,19 @@ void blk_mq_sched_insert_requests(struct request_queue *q, if (e && e->type->ops.mq.insert_requests) e->type->ops.mq.insert_requests(hctx, list, false); - else + else { + /* + * try to issue requests directly if the hw queue isn't + * busy in case of 'none' scheduler, and this way may save + * us one extra enqueue & dequeue to sw queue. + */ + if (!hctx->dispatch_busy && !e && !run_queue_async) { + blk_mq_try_issue_list_directly(hctx, list); + if (list_empty(list)) + return; + } blk_mq_insert_requests(hctx, ctx, list); + } blk_mq_run_hw_queue(hctx, run_queue_async); } |