From: brookxu <brookxu.cn@gmail.com>
To: paolo.valente@linaro.org, axboe@kernel.dk, tj@kernel.org
Cc: linux-block@vger.kernel.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [RFC PATCH v2 08/11] bfq: disallow idle if CLASS_RT waiting for service
Date: Fri, 12 Mar 2021 19:08:42 +0800 [thread overview]
Message-ID: <157b97d7bda348b657b09e9c5a294305cfe29329.1615527324.git.brookxu@tencent.com> (raw)
In-Reply-To: <cover.1615517202.git.brookxu@tencent.com>
In-Reply-To: <cover.1615527324.git.brookxu@tencent.com>
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
next prev parent reply other threads:[~2021-03-12 11:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 11:08 [RFC PATCH v2 00/11] bfq: introduce bfq.ioprio for cgroup brookxu
[not found] ` <cover.1615527324.git.brookxu@tencent.com>
2021-03-12 11:08 ` [RFC PATCH v2 01/11] bfq: introduce bfq_entity_to_bfqg helper method brookxu
2021-03-12 11:08 ` [RFC PATCH v2 02/11] bfq: convert the type of bfq_group.bfqd to bfq_data* brookxu
2021-03-12 11:08 ` [RFC PATCH v2 03/11] bfq: introduce bfq.ioprio for cgroup brookxu
2021-03-12 11:08 ` [RFC PATCH v2 04/11] bfq: limit the IO depth of idle_class to 1 brookxu
2021-03-12 11:08 ` [RFC PATCH v2 05/11] bfq: keep the minimun bandwidth for be_class brookxu
2021-03-12 11:08 ` [RFC PATCH v2 06/11] bfq: expire other class if CLASS_RT is waiting brookxu
2021-03-12 11:08 ` [RFC PATCH v2 07/11] bfq: optimse IO injection for CLASS_RT brookxu
2021-03-12 11:08 ` brookxu [this message]
2021-03-12 11:08 ` [RFC PATCH v2 09/11] bfq: disallow merge CLASS_RT with other class brookxu
2021-03-12 11:08 ` [RFC PATCH v2 10/11] bfq: remove unnecessary initialization logic brookxu
2021-03-12 11:08 ` [RFC PATCH v2 11/11] bfq: optimize the calculation of bfq_weight_to_ioprio() brookxu
2021-03-21 11:04 ` [RFC PATCH v2 00/11] bfq: introduce bfq.ioprio for cgroup Paolo Valente
2021-03-22 5:44 ` brookxu
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