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authorxiaobing tu <xiaobing.tu@intel.com>2012-12-09 13:19:23 -0500
committerJens Axboe <axboe@kernel.dk>2012-12-09 13:19:23 -0500
commit75274551c81796b636c5acb0c2597dec7ec2e6c4 (patch)
tree6854867ce09c9489e2563b1a0e3ccb0289674491
parent5f6f38dbb0fc8518b19542b0ad0739a8a95f05a1 (diff)
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>
-rw-r--r--block/deadline-iosched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 599b12e5380f..90037b5eb17f 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -230,7 +230,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
230 /* 230 /*
231 * rq is expired! 231 * rq is expired!
232 */ 232 */
233 if (time_after(jiffies, rq_fifo_time(rq))) 233 if (time_after_eq(jiffies, rq_fifo_time(rq)))
234 return 1; 234 return 1;
235 235
236 return 0; 236 return 0;