diff options
| -rw-r--r-- | block/cfq-iosched.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 11ce6aa..d582433 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -879,6 +879,13 @@ static struct cfq_queue *cfq_set_active_queue(struct cfq_data *cfqd) cfqq = list_entry_cfqq(cfqd->cur_rr.next); /* + * If no new queues are available, check if the busy list has some + * before falling back to idle io. + */ + if (!cfqq && !list_empty(&cfqd->busy_rr)) + cfqq = list_entry_cfqq(cfqd->busy_rr.next); + + /* * if we have idle queues and no rt or be queues had pending * requests, either allow immediate service if the grace period * has passed or arm the idle grace timer |
