| commit | 668ffc03418bc779f699797c72ecf968cd6525a9 | [log] [tgz] |
|---|---|---|
| author | Damien Le Moal <damien.lemoal@wdc.com> | Tue Nov 20 10:52:37 2018 +0900 |
| committer | Jens Axboe <axboe@kernel.dk> | Mon Nov 19 19:03:49 2018 -0700 |
| tree | 1392526ca5bb0cbe189e7d5ff5d469c51d2ef231 | |
| parent | 76dc891395dc61e92e2ff31b6161815ce5eb715b [diff] |
block: prevent merging of requests with different priorities Growing in size a high priority request by merging it with a lower priority BIO or request will increase the request execution time. This is the opposite result of the desired effect of high I/O priorities, namely getting low I/O latencies. Prevent merging of requests and BIOs that have different I/O priorities to fix this. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>