deadline: Allow 0ms deadline latency, increase the read speed
Change a timer compare from after to after-equals, thus allowing
0 timeout and making deadline schedule FIFO.
Signed-off-by: xiaobing tu <xiaobing.tu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 599b12e..90037b5 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -230,7 +230,7 @@
/*
* rq is expired!
*/
- if (time_after(jiffies, rq_fifo_time(rq)))
+ if (time_after_eq(jiffies, rq_fifo_time(rq)))
return 1;
return 0;