Commit 75274551 authored Dec 09, 2012 by xiaobing tu Committed by Jens Axboe Dec 09, 2012

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>

parent 5f6f38db

block/deadline-iosched.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;