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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 10/11] bfq: remove unnecessary initialization logic
Date: Fri, 12 Mar 2021 19:08:44 +0800	[thread overview]
Message-ID: <dae42cd3c1c9f798a3c390e0a14ef77d02e94ce0.1615527324.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>

Since we will initialize sched_data.service_tree[] in
bfq_init_root_group(), bfq_create_group_hierarchy() can
ignore this part of the initialization, which can avoid
repeated initialization.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
---
 block/bfq-cgroup.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c
index ab4bc410e635..05054e1b5d97 100644
--- a/block/bfq-cgroup.c
+++ b/block/bfq-cgroup.c
@@ -1514,15 +1514,11 @@ void bfqg_and_blkg_put(struct bfq_group *bfqg) {}
 struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node)
 {
 	struct bfq_group *bfqg;
-	int i;
 
 	bfqg = kmalloc_node(sizeof(*bfqg), GFP_KERNEL | __GFP_ZERO, node);
 	if (!bfqg)
 		return NULL;
 
-	for (i = 0; i < BFQ_IOPRIO_CLASSES; i++)
-		bfqg->sched_data.service_tree[i] = BFQ_SERVICE_TREE_INIT;
-
 	return bfqg;
 }
 #endif	/* CONFIG_BFQ_GROUP_IOSCHED */
-- 
2.30.0


WARNING: multiple messages have this Message-ID (diff)
From: brookxu <brookxu.cn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: paolo.valente-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org,
	tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Cc: linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [RFC PATCH v2 10/11] bfq: remove unnecessary initialization logic
Date: Fri, 12 Mar 2021 19:08:44 +0800	[thread overview]
Message-ID: <dae42cd3c1c9f798a3c390e0a14ef77d02e94ce0.1615527324.git.brookxu@tencent.com> (raw)
In-Reply-To: <cover.1615517202.git.brookxu-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
In-Reply-To: <cover.1615527324.git.brookxu-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>

From: Chunguang Xu <brookxu-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>

Since we will initialize sched_data.service_tree[] in
bfq_init_root_group(), bfq_create_group_hierarchy() can
ignore this part of the initialization, which can avoid
repeated initialization.

Signed-off-by: Chunguang Xu <brookxu-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
---
 block/bfq-cgroup.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c
index ab4bc410e635..05054e1b5d97 100644
--- a/block/bfq-cgroup.c
+++ b/block/bfq-cgroup.c
@@ -1514,15 +1514,11 @@ void bfqg_and_blkg_put(struct bfq_group *bfqg) {}
 struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node)
 {
 	struct bfq_group *bfqg;
-	int i;
 
 	bfqg = kmalloc_node(sizeof(*bfqg), GFP_KERNEL | __GFP_ZERO, node);
 	if (!bfqg)
 		return NULL;
 
-	for (i = 0; i < BFQ_IOPRIO_CLASSES; i++)
-		bfqg->sched_data.service_tree[i] = BFQ_SERVICE_TREE_INIT;
-
 	return bfqg;
 }
 #endif	/* CONFIG_BFQ_GROUP_IOSCHED */
-- 
2.30.0


  parent reply	other threads:[~2021-03-12 11:09 UTC|newest]

Thread overview: 21+ 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     ` 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     ` 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     ` 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
2021-03-12 11:08   ` [RFC PATCH v2 08/11] bfq: disallow idle if CLASS_RT waiting for service brookxu
2021-03-12 11:08     ` brookxu
2021-03-12 11:08   ` [RFC PATCH v2 09/11] bfq: disallow merge CLASS_RT with other class brookxu
2021-03-12 11:08     ` brookxu
2021-03-12 11:08   ` brookxu [this message]
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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