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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>
This commit is contained in:
xiaobing tu 2012-12-09 19:19:23 +01:00 committed by Jens Axboe
parent 5f6f38dbb0
commit 75274551c8
1 changed files with 1 additions and 1 deletions
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2
block/deadline-iosched.c
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@ -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;