Messages in this thread Patch in this message | | | From | brookxu <> | Subject | [RFC PATCH v2 08/11] bfq: disallow idle if CLASS_RT waiting for service | Date | Fri, 12 Mar 2021 19:08:42 +0800 |
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From: Chunguang Xu <brookxu@tencent.com>
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@tencent.com> --- 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
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