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-rw-r--r--block/cfq-iosched.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4525386..2b64f58 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -861,8 +861,8 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
* store what was left of this slice, if the queue idled out
* or was preempted
*/
- if (time_after(now, cfqq->slice_end))
- cfqq->slice_left = now - cfqq->slice_end;
+ if (time_after(cfqq->slice_end, now))
+ cfqq->slice_left = cfqq->slice_end - now;
else
cfqq->slice_left = 0;
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