From patchwork Sat Mar 5 09:12:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 12770290 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CD74C433F5 for ; Sat, 5 Mar 2022 08:56:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231208AbiCEI5m (ORCPT ); Sat, 5 Mar 2022 03:57:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230498AbiCEI5h (ORCPT ); Sat, 5 Mar 2022 03:57:37 -0500 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D9C1269A45; Sat, 5 Mar 2022 00:56:48 -0800 (PST) Received: from kwepemi500022.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4K9dkp4lYVz1GDMs; Sat, 5 Mar 2022 16:52:02 +0800 (CST) Received: from kwepemm600009.china.huawei.com (7.193.23.164) by kwepemi500022.china.huawei.com (7.221.188.64) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Sat, 5 Mar 2022 16:56:46 +0800 Received: from huawei.com (10.175.127.227) by kwepemm600009.china.huawei.com (7.193.23.164) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Sat, 5 Mar 2022 16:56:45 +0800 From: Yu Kuai To: , , , CC: , , , , Subject: [PATCH -next 08/11] block, bfq: record how many queues have pending requests in bfq_group Date: Sat, 5 Mar 2022 17:12:02 +0800 Message-ID: <20220305091205.4188398-9-yukuai3@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220305091205.4188398-1-yukuai3@huawei.com> References: <20220305091205.4188398-1-yukuai3@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemm600009.china.huawei.com (7.193.23.164) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Prepare to decrease 'num_groups_with_pending_reqs' earlier. bfqq will be inserted to weights_tree when new io is inserted to it, and bfqq will be removed from weights_tree when all the requests are completed. Thus use weights_tree insertion and removal to track how many queues have pending requests. Signed-off-by: Yu Kuai --- block/bfq-cgroup.c | 1 + block/bfq-iosched.c | 15 +++++++++++++++ block/bfq-iosched.h | 1 + 3 files changed, 17 insertions(+) diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c index 6cd65b5e790d..58acaf14a91d 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -557,6 +557,7 @@ static void bfq_pd_init(struct blkg_policy_data *pd) */ bfqg->bfqd = bfqd; bfqg->active_entities = 0; + bfqg->num_entities_with_pending_reqs = 0; bfqg->rq_pos_tree = RB_ROOT; } diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 07027dc9dc4c..2a48c40b4f02 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -928,6 +928,13 @@ void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_queue *bfqq, inc_counter: bfqq->weight_counter->num_active++; bfqq->ref++; + +#ifdef CONFIG_BFQ_GROUP_IOSCHED + if (!entity->in_groups_with_pending_reqs) { + entity->in_groups_with_pending_reqs = true; + bfqq_group(bfqq)->num_entities_with_pending_reqs++; + } +#endif } /* @@ -944,6 +951,14 @@ void __bfq_weights_tree_remove(struct bfq_data *bfqd, return; bfqq->weight_counter->num_active--; + +#ifdef CONFIG_BFQ_GROUP_IOSCHED + if (bfqq->entity.in_groups_with_pending_reqs) { + bfqq->entity.in_groups_with_pending_reqs = false; + bfqq_group(bfqq)->num_entities_with_pending_reqs--; + } +#endif + if (bfqq->weight_counter->num_active > 0) goto reset_entity_pointer; diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h index 4530ab8b42ac..5d904851519c 100644 --- a/block/bfq-iosched.h +++ b/block/bfq-iosched.h @@ -940,6 +940,7 @@ struct bfq_group { struct bfq_entity *my_entity; int active_entities; + int num_entities_with_pending_reqs; struct rb_root rq_pos_tree;