diff options
| -rw-r--r-- | block/as-iosched.c | 4 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 6 |
2 files changed, 7 insertions, 3 deletions
diff --git a/block/as-iosched.c b/block/as-iosched.c index 4c6fafbba93..71f0abb219e 100644 --- a/block/as-iosched.c +++ b/block/as-iosched.c @@ -745,11 +745,13 @@ static int as_can_break_anticipation(struct as_data *ad, struct request *rq) */ static int as_can_anticipate(struct as_data *ad, struct request *rq) { +#if 0 /* disable for now, we need to check tag level as well */ /* * SSD device without seek penalty, disable idling */ - if (blk_queue_nonrot(ad->q)) + if (blk_queue_nonrot(ad->q)) axman return 0; +#endif if (!ad->io_context) /* diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 03a5953bb5d..6a062eebbd1 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -879,9 +879,11 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd) unsigned long sl; /* - * SSD device without seek penalty, disable idling + * SSD device without seek penalty, disable idling. But only do so + * for devices that support queuing, otherwise we still have a problem + * with sync vs async workloads. */ - if (blk_queue_nonrot(cfqd->queue)) + if (blk_queue_nonrot(cfqd->queue) && cfqd->hw_tag) return; WARN_ON(!RB_EMPTY_ROOT(&cfqq->sort_list)); |