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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>
master
xiaobing tu 10 years ago committed by Jens Axboe
parent
commit
75274551c8
  1. 2
      block/deadline-iosched.c

2
block/deadline-iosched.c

@ -230,7 +230,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir) @@ -230,7 +230,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
/*
* rq is expired!
*/
if (time_after(jiffies, rq_fifo_time(rq)))
if (time_after_eq(jiffies, rq_fifo_time(rq)))
return 1;
return 0;

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