block: improve logic around when to sort a plug list

Only do it if we have requests for multiple queues in the same
plug.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2018-11-27 17:13:56 -07:00
commit ce5b009cff
3 changed files with 20 additions and 5 deletions