From patchwork Thu Jul 27 08:04:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329455 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 4F9F1C0015E for ; Thu, 27 Jul 2023 08:17:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232749AbjG0IRo (ORCPT ); Thu, 27 Jul 2023 04:17:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233142AbjG0IQg (ORCPT ); Thu, 27 Jul 2023 04:16:36 -0400 Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C71275B88 for ; Thu, 27 Jul 2023 01:10:01 -0700 (PDT) Received: by mail-pf1-x431.google.com with SMTP id d2e1a72fcca58-682ae5d4184so170876b3a.1 for ; Thu, 27 Jul 2023 01:10:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445345; x=1691050145; 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=XxxR7cKF9GXj8MC2HKPXqv6o5/ypcgPst5/afOqmqdU=; b=f78FOiI4CNId+Ml2PzU7mY1IxHereBLlHPf7s7X8Gy+u8ge3z2zcNtZJbXgkJ1G/QR Bypsj3Qfs4NqFk8L9OHPUra+lfok5RS+DDluwPHI9kxnAJLSgVKbtyU1LC00kLM6jzmr VkgjJJoznrUMJZqGeb8qVz0Juy94c4XL4Hr58JZjfVBDwwW2089Gloj9mnDr01+e3vie ATN8u6YkhMkKc+i92NbP56LSIJl/sZe4eRd/+9U9Zz62iXDekK8cKEfr5HTH0aUYxIkr BT13YNvigorKsMJZpm5Ugf1VrzOLWJZerOzcVEByhulhpkn1iKJBA5Dz0oLwz2cUXQdL iC6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445345; x=1691050145; 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=XxxR7cKF9GXj8MC2HKPXqv6o5/ypcgPst5/afOqmqdU=; b=WRagr4ybFCqowa4NKu0eI3rR/SEZLEkqIinSh5bJGniVZESwWLm6443WQBbntsw76p //MWoFhz70BEu8dGZwiOTvb+15Sq+cMx/h53AlkffnoIR2RO0rZKm0DUmDjMi8PLXI91 KPdbLBQPfGqM1t84TMZz0E2vZ6TSM8QVBlTG/p9HjaSAXUMlzf4himBAdtCRYTT7EYbJ eiq1nlk1QUyoVgr27Ap5mUjHxjet9PFo4YNufRyxDIM/c+9qc3C09GZKfUsZdoePdLpn 33O8NcwYLM3fNhG1KrqtZi5lyc84lc1MNHj3aANLV5xMKw3LutCWULH+VZn3R+Hwx7+Q Vm6A== X-Gm-Message-State: ABy/qLYZXqX+O3dOCUfByBW6B7ugieETz8NqTXcSTekV7dZmFvD4Uayq UdIRXXAfuSSw76woGGWCmeXwug== X-Google-Smtp-Source: APBJJlFoKDsbKkERIQGnm+LFaFeLpxhRzI1EaDrRxfTAKZLr632PKwn78Yey2tH1KRLEMSWua5HIxg== X-Received: by 2002:a05:6a00:4a10:b0:686:b990:560f with SMTP id do16-20020a056a004a1000b00686b990560fmr4379620pfb.2.1690445344746; Thu, 27 Jul 2023 01:09:04 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:04 -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 , Muchun Song Subject: [PATCH v3 16/49] nfsd: dynamically allocate the nfsd-filecache shrinker Date: Thu, 27 Jul 2023 16:04:29 +0800 Message-Id: <20230727080502.77895-17-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Use new APIs to dynamically allocate the nfsd-filecache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfsd/filecache.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index ee9c923192e0..872eb9501965 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -521,11 +521,7 @@ nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc) return ret; } -static struct shrinker nfsd_file_shrinker = { - .scan_objects = nfsd_file_lru_scan, - .count_objects = nfsd_file_lru_count, - .seeks = 1, -}; +static struct shrinker *nfsd_file_shrinker; /** * nfsd_file_cond_queue - conditionally unhash and queue a nfsd_file @@ -746,12 +742,18 @@ nfsd_file_cache_init(void) goto out_err; } - ret = register_shrinker(&nfsd_file_shrinker, "nfsd-filecache"); - if (ret) { - pr_err("nfsd: failed to register nfsd_file_shrinker: %d\n", ret); + nfsd_file_shrinker = shrinker_alloc(0, "nfsd-filecache"); + if (!nfsd_file_shrinker) { + pr_err("nfsd: failed to allocate nfsd_file_shrinker\n"); goto out_lru; } + nfsd_file_shrinker->count_objects = nfsd_file_lru_count; + nfsd_file_shrinker->scan_objects = nfsd_file_lru_scan; + nfsd_file_shrinker->seeks = 1; + + shrinker_register(nfsd_file_shrinker); + ret = lease_register_notifier(&nfsd_file_lease_notifier); if (ret) { pr_err("nfsd: unable to register lease notifier: %d\n", ret); @@ -774,7 +776,7 @@ nfsd_file_cache_init(void) out_notifier: lease_unregister_notifier(&nfsd_file_lease_notifier); out_shrinker: - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); out_lru: list_lru_destroy(&nfsd_file_lru); out_err: @@ -891,7 +893,7 @@ nfsd_file_cache_shutdown(void) return; lease_unregister_notifier(&nfsd_file_lease_notifier); - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); /* * make sure all callers of nfsd_file_lru_cb are done before * calling nfsd_file_cache_purge