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-rw-r--r--block/cfq-iosched.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index fea1b5a..7785169 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2417,19 +2417,14 @@ static bool cfq_may_dispatch(struct cfq_data *cfqd, struct cfq_queue *cfqq)
return false;
/*
- * If there is only one sync queue, and its think time is
- * small, we can ignore async queue here and give the sync
+ * If there is only one sync queue
+ * we can ignore async queue here and give the sync
* queue no dispatch limit. The reason is a sync queue can
* preempt async queue, limiting the sync queue doesn't make
* sense. This is useful for aiostress test.
*/
- if (cfq_cfqq_sync(cfqq) && cfqd->busy_sync_queues == 1) {
- struct cfq_io_context *cic = RQ_CIC(cfqq->next_rq);
-
- if (sample_valid(cic->ttime_samples) &&
- cic->ttime_mean < cfqd->cfq_slice_idle)
- promote_sync = true;
- }
+ if (cfq_cfqq_sync(cfqq) && cfqd->busy_sync_queues == 1)
+ promote_sync = true;
/*
* We have other queues, don't allow more IO from this one
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