Commit e0cca8bc authored by Jinlong Chen's avatar Jinlong Chen Committed by Jens Axboe
Browse files

elevator: printk a warning if switching to a new io scheduler fails 



printk a warning to indicate that the io scheduler has been set to none
if switching to a new io scheduler fails.

Suggested-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJinlong Chen <nickyc975@zju.edu.cn>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/d51ed0fb457db7a4f9cbb0dbce36d534e22be457.1669126766.git.nickyc975@zju.edu.cn


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent ac1171bd

block/elevator.c

+6 −0
Original line number Diff line number Diff line
@@ -683,6 +683,12 @@ int elevator_switch(struct request_queue *q, struct elevator_type *new_e) 
out_unfreeze:

	blk_mq_unquiesce_queue(q);

	blk_mq_unfreeze_queue(q);



	if (ret) {

		pr_warn("elv: switch to \"%s\" failed, falling back to \"none\"\n",

			new_e->elevator_name);

	}



	return ret;

}