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authorBart Van Assche <bart.vanassche@sandisk.com>2017-06-01 18:55:13 +0300
committerJens Axboe <axboe@fb.com>2017-06-01 22:03:00 +0300
commitedea55abb86ff67afda96120d6254290e7a75d9e (patch)
tree3dab507e31ac6b492fd21cc21f45c38f5bce9e19
parent2720bab50258782573df0f536681bece11e784f0 (diff)
downloadlinux-edea55abb86ff67afda96120d6254290e7a75d9e.tar.xz
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>
-rw-r--r--block/blk-mq-debugfs.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 90c454bbaf92..9edebbdce0bd 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -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;