From: Ming Lei <ming.lei@redhat.com>
Date: Sat, 2 Jun 2018 15:18:09 +0800
Subject: [PATCH] blk-mq: update nr_requests when switching to 'none' scheduler
Git-commit: 32a50fabb334b2f0725de84bf248bd8c24c22b05
Patch-mainline: v4.18-rc1
References: bsc#1104967,FATE#325924
Now we setup q->nr_requests when switching to one new scheduler,
but not do it for 'none', then q->nr_requests may not be correct
for 'none'.
This patch fixes this issue by always updating 'nr_requests' when
switching to 'none'.
Cc: Marco Patalano <mpatalan@redhat.com>
Cc: "Ewan D. Milne" <emilne@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/blk-mq-sched.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index b1f06088cee5..56c493c6cd90 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -585,6 +585,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e)
if (!e) {
q->elevator = NULL;
+ q->nr_requests = q->tag_set->queue_depth;
return 0;
}
--
2.16.4