From patchwork Thu Jul 27 08:04:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13330524 X-Patchwork-Delegate: snitzer@redhat.com 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 us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C28A6C001DC for ; Thu, 27 Jul 2023 17:55:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690480531; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=gJGrzSDdB4wgOAy4DYplaF9tuniGU0xBlB/wtlhlsgw=; b=P8S0Dvaz1YAV2vcS4L0sHdkpNfnTkCmjLuyhyVoeClALpfIzHsCeqUWdbGVa7aTMjo8vUm qVuDRN5NTUuIII6TtXc0Q2Pl99USsksj2zPSdS5OtufB15q1CNP1AlAfKZaUfCJHcC4h/Q aL3hjKk8iZgdSDL9/QyUuiCt0CqsqM8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-619-iDsJkQmrOVSF1HKlUhhD4A-1; Thu, 27 Jul 2023 13:55:29 -0400 X-MC-Unique: iDsJkQmrOVSF1HKlUhhD4A-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1035A8870D9; Thu, 27 Jul 2023 17:55:03 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (unknown [10.30.29.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id ECC8C2166B25; Thu, 27 Jul 2023 17:55:02 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (localhost [IPv6:::1]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id BDEE3194E107; Thu, 27 Jul 2023 17:54:58 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id 9A4C61946A6C for ; Thu, 27 Jul 2023 08:09:45 +0000 (UTC) Received: by smtp.corp.redhat.com (Postfix) id 716EBC2C857; Thu, 27 Jul 2023 08:09:45 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6A354C2C856 for ; Thu, 27 Jul 2023 08:09:45 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 50EDF801CF8 for ; Thu, 27 Jul 2023 08:09:45 +0000 (UTC) Received: from mail-pf1-f180.google.com (mail-pf1-f180.google.com [209.85.210.180]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-681-Ho5cfPDTMiC1X-M_gdaCvg-1; Thu, 27 Jul 2023 04:09:42 -0400 X-MC-Unique: Ho5cfPDTMiC1X-M_gdaCvg-1 Received: by mail-pf1-f180.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so167942b3a.0 for ; Thu, 27 Jul 2023 01:09:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445381; x=1691050181; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GSWsN00ewH1CUxuL2on0amogNZtYjpfZMPk3tXk1MLc=; b=Ya0rRT03XEY/0qxDK+H6o3I3aYhoD3/YrVBjb1TVqWqUcW/84InwcLzTHME193KQ3I MRTPW6Dv0kYwkzycLa0hvpVhSPmFTArOh2852sqANeOO17cYZx2VRCHLdVYQH/6ZwShs BpM6o+vmEG7bh0ZoEcYtbYGqfI6Pjnqdk1VAykueqdHXpbL7otCV432HNYkzeAextvsL qGzD+x3cYM5+qt6g+VjEF3Kbc0pAS7pSex6uL6/bx+hqAhtwZB9VzmGEIsounz2kGVGH PDQ4MixRGq9yomGlMg13xkNSXcpIWZRib9pvVJn0Iv6mRWuVdq0T8JkyvCrcIh7oK+Qd DxCA== X-Gm-Message-State: ABy/qLYsu3s9nr4exudQHe4GTlxmuDverwET7Lj841O1jjGIdvo65gYV nHkVxuV4EcpfV/LzcFbBvVulFA== X-Google-Smtp-Source: APBJJlHVjyqYSo1ak3Z7chV1yhtxMPzG2+b/e8BLYdWQhXdIbtZlkhi04HlfYJAG9z5TWY/X++2RBQ== X-Received: by 2002:a05:6a20:729a:b0:100:b92b:e8be with SMTP id o26-20020a056a20729a00b00100b92be8bemr5576237pzk.2.1690445381598; Thu, 27 Jul 2023 01:09:41 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:41 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Date: Thu, 27 Jul 2023 16:04:32 +0800 Message-Id: <20230727080502.77895-20-zhengqi.arch@bytedance.com> In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 X-Mailman-Approved-At: Thu, 27 Jul 2023 17:54:53 +0000 Subject: [dm-devel] [PATCH v3 19/49] rcu: dynamically allocate the rcu-lazy shrinker X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-mm@kvack.org, dm-devel@redhat.com, linux-mtd@lists.infradead.org, x86@kernel.org, cluster-devel@redhat.com, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, linux-arm-msm@vger.kernel.org, rcu@vger.kernel.org, linux-bcache@vger.kernel.org, Qi Zheng , linux-raid@vger.kernel.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-btrfs@vger.kernel.org Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: bytedance.com Use new APIs to dynamically allocate the rcu-lazy shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree_nocb.h | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 5598212d1f27..e1c59c33738a 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1396,13 +1396,6 @@ lazy_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return count ? count : SHRINK_STOP; } - -static struct shrinker lazy_rcu_shrinker = { - .count_objects = lazy_rcu_shrink_count, - .scan_objects = lazy_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; #endif // #ifdef CONFIG_RCU_LAZY void __init rcu_init_nohz(void) @@ -1410,6 +1403,7 @@ void __init rcu_init_nohz(void) int cpu; struct rcu_data *rdp; const struct cpumask *cpumask = NULL; + struct shrinker * __maybe_unused lazy_rcu_shrinker; #if defined(CONFIG_NO_HZ_FULL) if (tick_nohz_full_running && !cpumask_empty(tick_nohz_full_mask)) @@ -1436,8 +1430,16 @@ void __init rcu_init_nohz(void) return; #ifdef CONFIG_RCU_LAZY - if (register_shrinker(&lazy_rcu_shrinker, "rcu-lazy")) - pr_err("Failed to register lazy_rcu shrinker!\n"); + lazy_rcu_shrinker = shrinker_alloc(0, "rcu-lazy"); + if (!lazy_rcu_shrinker) { + pr_err("Failed to allocate lazy_rcu shrinker!\n"); + } else { + lazy_rcu_shrinker->count_objects = lazy_rcu_shrink_count; + lazy_rcu_shrinker->scan_objects = lazy_rcu_shrink_scan; + lazy_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(lazy_rcu_shrinker); + } #endif // #ifdef CONFIG_RCU_LAZY if (!cpumask_subset(rcu_nocb_mask, cpu_possible_mask)) {