1 files changed, 4 insertions, 9 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index fea1b5a9b7e..7785169f3c8 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