From: Chunguang Xu <brookxu@xxxxxxxxxxx> if CLASS_RT is waiting for service，queues belong to other class disallow idle, so that a schedule can be invoked in time. Signed-off-by: Chunguang Xu <brookxu@xxxxxxxxxxx> --- block/bfq-iosched.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index a5f13589df79..9330043cdd53 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -4263,6 +4263,11 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq) if (unlikely(bfqd->strict_guarantees)) return true; +#ifdef CONFIG_BFQ_GROUP_IOSCHED + if (!bfq_class_rt(bfqq) && bfqd->busy_groups[0]) + return false; +#endif + /* * Idling is performed only if slice_idle > 0. In addition, we * do not idle if -- 2.30.0
