diff options
| author | Damien Le Moal <damien.lemoal@wdc.com> | 2018-11-20 10:52:37 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-19 19:03:49 -0700 |
| commit | 668ffc03418bc779f699797c72ecf968cd6525a9 (patch) | |
| tree | 1392526ca5bb0cbe189e7d5ff5d469c51d2ef231 /include/linux/dcookies.h | |
| 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>
Diffstat (limited to 'include/linux/dcookies.h')
0 files changed, 0 insertions, 0 deletions