Commit edea55ab authored Jun 01, 2017 by Bart Van Assche Committed by Jens Axboe Jun 01, 2017

blk-mq-debugfs: Add 'kick' operation



Running a queue causes the block layer to examine the per-CPU and
hw queues but not the requeue list. Hence add a 'kick' operation
that also examines the requeue list.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Eduardo Valentin <eduval@amazon.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent 2720bab5

block/blk-mq-debugfs.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -114,10 +114,12 @@ static ssize_t queue_state_write(void data, const char __user buf,
		blk_mq_run_hw_queues(q, true);
		} else if (strcmp(op, "start") == 0) {
		blk_mq_start_stopped_hw_queues(q, true);
		} else if (strcmp(op, "kick") == 0) {
		blk_mq_kick_requeue_list(q);
		} else {
		pr_err("%s: unsupported operation '%s'\n", __func__, op);
		inval:
		pr_err("%s: use either 'run' or 'start'\n", __func__);
		pr_err("%s: use 'run', 'start' or 'kick'\n", __func__);
		return -EINVAL;
		}
		return count;