From patchwork Mon Aug 7 11:09:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13343549 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 E1A9AEB64DD for ; Mon, 7 Aug 2023 11:17:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232238AbjHGLRL (ORCPT ); Mon, 7 Aug 2023 07:17:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53532 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232027AbjHGLQz (ORCPT ); Mon, 7 Aug 2023 07:16:55 -0400 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA9D0269E for ; Mon, 7 Aug 2023 04:15:29 -0700 (PDT) Received: by mail-pg1-x531.google.com with SMTP id 41be03b00d2f7-51f64817809so360399a12.1 for ; Mon, 07 Aug 2023 04:15:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406841; x=1692011641; 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=a0ijFA9s9bGVMHT4vLgTYS12L8yx2Rc7o6TjM9ZoJx8=; b=j23yTPIuNE+5ql7c6DjTIXWDr8oKTSMtsFBsjjClL+S91jhwZsCcQpsRFgnSFEePMC wDGERQ9BkTMGtvLZ5zfdg/UY3HTRyGts+YmZTXabmNDPI0OPAQAqDfrw+jtLBHzydYmo a162rquUe53dODAJSpyuVfvHf3Ov/M30E8XZRIYttEwAxKqQFIS0/ih88OAzPNYyRzzl 3HkOwk/otVmt9H2o9TgGnt1eeNwmmBoINVdlSrRso11GlktIoEp92Q8ZBNulwW/JkpbE xeEGYB8AYsoVpHQBF7XcqQ5QT7dfjGJtE4RXA0EdlD1H8/kYwDQ1OkZhdkl3HITdo9Iq hOkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406841; x=1692011641; 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=a0ijFA9s9bGVMHT4vLgTYS12L8yx2Rc7o6TjM9ZoJx8=; b=eTEy4Jxdwdk/tDFzLrga7c8iuRGlMRx3Y3HiDhWqdJHXGZKgtTgUsb6Pege0kkJi7y yLY01XQU0cMVwqf/T0Q7pYRQeYMAbW1QwpKxPTcg+FCwZC2wgZ/4mqwFKGv/EynaKoMT Udx9w56kR5Pg+ZF3IADZYBk39Ec0SBVSgdwwhxamHcJVBeQOEolHuqtVRdT19ESfycR0 2p7UoOseYlaJFALNhwozpZhLQ2MhenXevU3UVbVn89Akv5kAdA7dvt1MspR8Z6EXaBuP l5eUwQ6+eKvSq28DH4535mp/I884vUDiI1kIboxIYZGA33+Jx9PjPIqpvmIG+tkkBoak BgGA== X-Gm-Message-State: AOJu0Yy03IgDTMGc5oDPYfUH/qpohl2qEGtRdePZP5ygvC40/zDRh+nu PO5Zp/exSDhxS7ZKf8Z63ctAVg== X-Google-Smtp-Source: AGHT+IELWLhV4Bj40lkko/D2F7gtSRcHKPclt9k8JlXsq8dyT7OdoG/0VZRRAUzfMJnehzLNwTS/oA== X-Received: by 2002:a17:90a:2909:b0:269:5bf7:d79c with SMTP id g9-20020a17090a290900b002695bf7d79cmr2214416pjd.1.1691406841328; Mon, 07 Aug 2023 04:14:01 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.13.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:01 -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, simon.horman@corigine.com, dlemoal@kernel.org 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 v4 19/48] rcu: dynamically allocate the rcu-kfree shrinker Date: Mon, 7 Aug 2023 19:09:07 +0800 Message-Id: <20230807110936.21819-20-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-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-kfree shrinker. Signed-off-by: Qi Zheng Reviewed-by: Joel Fernandes (Google) Reviewed-by: Muchun Song --- kernel/rcu/tree.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 7c79480bfaa0..3b20fc46c514 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3449,13 +3449,6 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return freed == 0 ? SHRINK_STOP : freed; } -static struct shrinker kfree_rcu_shrinker = { - .count_objects = kfree_rcu_shrink_count, - .scan_objects = kfree_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; - void __init kfree_rcu_scheduler_running(void) { int cpu; @@ -4931,6 +4924,7 @@ static void __init kfree_rcu_batch_init(void) { int cpu; int i, j; + struct shrinker *kfree_rcu_shrinker; /* Clamp it to [0:100] seconds interval. */ if (rcu_delay_page_cache_fill_msec < 0 || @@ -4962,8 +4956,18 @@ static void __init kfree_rcu_batch_init(void) INIT_DELAYED_WORK(&krcp->page_cache_work, fill_page_cache_func); krcp->initialized = true; } - if (register_shrinker(&kfree_rcu_shrinker, "rcu-kfree")) - pr_err("Failed to register kfree_rcu() shrinker!\n"); + + kfree_rcu_shrinker = shrinker_alloc(0, "rcu-kfree"); + if (!kfree_rcu_shrinker) { + pr_err("Failed to allocate kfree_rcu() shrinker!\n"); + return; + } + + kfree_rcu_shrinker->count_objects = kfree_rcu_shrink_count; + kfree_rcu_shrinker->scan_objects = kfree_rcu_shrink_scan; + kfree_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(kfree_rcu_shrinker); } void __init rcu_init(void)