From patchwork Mon Jul 24 09:43:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13324001 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 48A83C04FE0 for ; Mon, 24 Jul 2023 09:54:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232523AbjGXJyP (ORCPT ); Mon, 24 Jul 2023 05:54:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232689AbjGXJxD (ORCPT ); Mon, 24 Jul 2023 05:53:03 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30ACCE7C for ; Mon, 24 Jul 2023 02:49:07 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-1bb85ed352bso2235865ad.0 for ; Mon, 24 Jul 2023 02:49:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690192110; x=1690796910; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8oqpenbl7KoJJhQpMWpio5jwf7tXqseO0h4l218M5aA=; b=aCj2BNfrpcxtoTz1/CdONfPnB9TAYVTaqB4T4WqFv6y7Hxl9V0boEFHOTATComBNn2 xnFJ8tDKgZzO2TH4FwPeDTaYzb9x0D/uxmdjUcwFhXWgN5824wox+O8c9U9ybGUIohlv M3vK6kDUgbRBz02IXlUWPuxdPW8hkxiMWgJebr95xqiqSLJbGYOLAINvEuBU6c5+0m2D KwQfMs1a5lB1SKCsavAJR55Sjok6of8gfoBXMKjbRTfwQ6NM1BD/3dZZP6dR7OXOKSHl QBl4iWtqq0OikEBOGyMzrxqP+jJMX2cWmHkmCbYCS6DP7MDoD2ilfcJavniQ/pgHFrWu bw9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690192110; x=1690796910; 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=8oqpenbl7KoJJhQpMWpio5jwf7tXqseO0h4l218M5aA=; b=Y6rUtFCHXA1hNg7X9SQ7ncIZ7npsizRClVrcJeZXZBSYaoJXBEhSq8XS+Njg/X8Cv/ VkjiGvQ37NI5j+0z3BBnOavRxXgZ3W+DPlQ8ff6tOAfffGRjsHLyPFl/ngmNVDA6fOgI BJ2TVP/kocOaX4uV0TNACyRIJcxwiSGi57yaLFEQLHjX0ovXOPIEz5khwUU3vRrVxBEf r4xfXuZiBGxSxQEUBoTsTApO++UGO58YWyZx1zjIZ01acUHHQ0gmGLDnqhywv0ZnCd7F xf4hYtMvwv3lS/EOF7GIkq869J2OjCSgtOexLYnkIZUhkVkeY7mhIb4DmnTFKeOvXlbv 3iEw== X-Gm-Message-State: ABy/qLar9cx9HYdKEXi+84Lfp1SeWI5xDv2zoPqN1AyZnYxOF2x3B7ZV tAhA0aBHs/dsOw/gSIOVXJoMVQ== X-Google-Smtp-Source: APBJJlFv5Kl04F8rp2naJTMNzHe6rYzFJJPXcSejcs04WaV/YhAbklIOobqPbsV/O0Fdd5o/IKlERw== X-Received: by 2002:a17:902:d484:b0:1b8:a27d:f591 with SMTP id c4-20020a170902d48400b001b8a27df591mr12259746plg.5.1690192110449; Mon, 24 Jul 2023 02:48:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id d5-20020a170902c18500b001bb20380bf2sm8467233pld.13.2023.07.24.02.48.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 02:48:30 -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 Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v2 17/47] rcu: dynamically allocate the rcu-lazy shrinker Date: Mon, 24 Jul 2023 17:43:24 +0800 Message-Id: <20230724094354.90817-18-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230724094354.90817-1-zhengqi.arch@bytedance.com> References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Use new APIs to dynamically allocate the rcu-lazy shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree_nocb.h | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 43229d2b0c44..919f17561733 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1397,12 +1397,7 @@ 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, -}; +static struct shrinker *lazy_rcu_shrinker; #endif // #ifdef CONFIG_RCU_LAZY void __init rcu_init_nohz(void) @@ -1436,8 +1431,16 @@ 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)) {