[PATCH V2] blk-mq: update hctx->dispatch_busy in case of real scheduler

Ming Lei
2021-06-04T00:09:29Z

Commit 6e6fcbc27e77 ("blk-mq: support batching dispatch in case of io")
starts to support io batching submission by using hctx->dispatch_busy.

However, blk_mq_update_dispatch_busy() isn't changed to update hctx->dispatch_busy
in that commit, so fix the issue by updating hctx->dispatch_busy in case
of real scheduler.

Reported-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Fixes: 6e6fcbc27e77 ("blk-mq: support batching dispatch in case of io")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
block/blk-mq.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 4261adee9964..5af4f099cdb0 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1224,9 +1224,6 @@ static void blk_mq_update_dispatch_busy(struct blk_mq_hw_ctx *hctx, bool busy)
{
unsigned int ewma;

- if (hctx->queue->elevator)
- return;
-
ewma = hctx->dispatch_busy;

if (!ewma && !busy)
--
2.31.1