From patchwork Mon Jul 24 09:43:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13324002 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 D37B1C07E8A for ; Mon, 24 Jul 2023 09:54:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232585AbjGXJyQ (ORCPT ); Mon, 24 Jul 2023 05:54:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232607AbjGXJwx (ORCPT ); Mon, 24 Jul 2023 05:52:53 -0400 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33B501BCE for ; Mon, 24 Jul 2023 02:49:18 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id d9443c01a7336-1b7dfb95761so5877625ad.1 for ; Mon, 24 Jul 2023 02:49:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690192122; x=1690796922; 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=SZ4CyloeMnj8DJaX3jH++Kh0s8L9fcE8HheaL79+C9E=; b=J/Bt6a5BMqhvdU/1SLuQX4nGlsOFwUStDgY9eH2v8f3RVdFq/sd3J4KWhio/dC9+p1 I7x8MAszW6LDKxiafO3ijuVZWlwLloveljXquKUGhfhkI+gBmVZ+aRdkRgZMuHOMA0H0 yKIvOrvLzQBJ0AtrK9ni37EuWpbTH6Gi1xp5mvGIU09YEhbSx5XeAtmIIM3L0YDCA4IY cOQImgDx6CerfFdixsFA7q/WRBoRbwfsUuvzftsn9rBMTfKTu+7IX9QKeDCcJjiigyeD MRXtrE3UPxmcDS5U+FzEfuL+bhB6TGOFiKBVZLyyImDcoC0jgqbvAUMVzKpuo72Ccxdg yqhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690192122; x=1690796922; 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=SZ4CyloeMnj8DJaX3jH++Kh0s8L9fcE8HheaL79+C9E=; b=Slwcq+IAONezryLZPgfp+Y8x451e54gEtpTWK43OHQRLjBFuJN3pJgKvZOPXOR3afK 2Heyqtfaf4AurkAJoqmJfM+AI5zSlWz1dkjjF4U6vPec1tVOWupOpdqYhtKaJHCFmFzA IXH7lliqgg9u2kALuO/IOKM5qS15Bfwas+TRDDl294hR+mrJ6GjWIvVkntxwSl/AFTDc 6hxpa9LyiT/J5MbXj16KREoYsahNetPqVPRUIK3N648cWTXJqbONqn/DylpQYbIvRN3T 19jQv6oN5E9aMHFRwNdINU94mJjLTzhV17TeTaPsVCHXWc+JqB7HQ+uDXaogjqygr6rk LvuA== X-Gm-Message-State: ABy/qLaTUzxjmXs+5kCf0lYuT6THIxlYAQtMkfpnAHP2Xsg1prJFkLvK KhP5xfDYJuJauJtlEjMts98mOw== X-Google-Smtp-Source: APBJJlGdl4zR2tT8oeBRlnNa82kteJScCMEv7aXbUuimbAqUFJ617TPjzQL08XTMcGzg+wanNIE0AA== X-Received: by 2002:a17:902:ecce:b0:1b8:b55d:4cff with SMTP id a14-20020a170902ecce00b001b8b55d4cffmr12423850plh.2.1690192122325; Mon, 24 Jul 2023 02:48:42 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id d5-20020a170902c18500b001bb20380bf2sm8467233pld.13.2023.07.24.02.48.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 02:48:41 -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 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 18/47] rcu: dynamically allocate the rcu-kfree shrinker Date: Mon, 24 Jul 2023 17:43:25 +0800 Message-Id: <20230724094354.90817-19-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-kfree shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 1449cb69a0e0..d068ce3567fc 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3445,12 +3445,7 @@ 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, -}; +static struct shrinker *kfree_rcu_shrinker; void __init kfree_rcu_scheduler_running(void) { @@ -4958,8 +4953,18 @@ 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)