Now that root group is counted into 'num_groups_with_pending_reqs', 'num_groups_with_pending_reqs > 0' is always true in bfq_asymmetric_scenario(). Thus change the condition to 'num_groups_with_pending_reqs > 1'. On the other hand, now that 'num_groups_with_pending_reqs' represents how many groups have pending requests, this change can enable concurrent sync io is only on cgroup is activated. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- block/bfq-iosched.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 39abcd95df8e..7d9f94882f8e 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -846,7 +846,7 @@ static bool bfq_asymmetric_scenario(struct bfq_data *bfqd, return varied_queue_weights || multiple_classes_busy #ifdef CONFIG_BFQ_GROUP_IOSCHED - || bfqd->num_groups_with_pending_reqs > 0 + || bfqd->num_groups_with_pending_reqs > 1 #endif ; } -- 2.31.1
