diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/cfq-iosched.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 4cd59b0d7c1..73a58628f54 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -646,11 +646,11 @@ cfq_set_prio_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq) static inline bool cfq_slice_used(struct cfq_queue *cfqq) { if (cfq_cfqq_slice_new(cfqq)) - return 0; + return false; if (time_before(jiffies, cfqq->slice_end)) - return 0; + return false; - return 1; + return true; } /* @@ -1901,10 +1901,10 @@ static bool cfq_should_idle(struct cfq_data *cfqd, struct cfq_queue *cfqq) * in their service tree. */ if (service_tree->count == 1 && cfq_cfqq_sync(cfqq)) - return 1; + return true; cfq_log_cfqq(cfqd, cfqq, "Not idling. st->count:%d", service_tree->count); - return 0; + return false; } static void cfq_arm_slice_timer(struct cfq_data *cfqd) @@ -2293,6 +2293,17 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd) goto keep_queue; } + /* + * This is a deep seek queue, but the device is much faster than + * the queue can deliver, don't idle + **/ + if (CFQQ_SEEKY(cfqq) && cfq_cfqq_idle_window(cfqq) && + (cfq_cfqq_slice_new(cfqq) || + (cfqq->slice_end - jiffies > jiffies - cfqq->slice_start))) { + cfq_clear_cfqq_deep(cfqq); + cfq_clear_cfqq_idle_window(cfqq); + } + if (cfqq->dispatched && cfq_should_idle(cfqd, cfqq)) { cfqq = NULL; goto keep_queue; @@ -2367,12 +2378,12 @@ static inline bool cfq_slice_used_soon(struct cfq_data *cfqd, { /* the queue hasn't finished any request, can't estimate */ if (cfq_cfqq_slice_new(cfqq)) - return 1; + return true; if (time_after(jiffies + cfqd->cfq_slice_idle * cfqq->dispatched, cfqq->slice_end)) - return 1; + return true; - return 0; + return false; } static bool cfq_may_dispatch(struct cfq_data *cfqd, struct cfq_queue *cfqq) @@ -3265,6 +3276,10 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, if (cfq_class_rt(new_cfqq) && !cfq_class_rt(cfqq)) return true; + /* An idle queue should not be idle now for some reason */ + if (RB_EMPTY_ROOT(&cfqq->sort_list) && !cfq_should_idle(cfqd, cfqq)) + return true; + if (!cfqd->active_cic || !cfq_cfqq_wait_request(cfqq)) return false; |