From patchwork Mon Jul 24 09:43:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13323730 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 89152C05052 for ; Mon, 24 Jul 2023 09:48:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231403AbjGXJsK (ORCPT ); Mon, 24 Jul 2023 05:48:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230195AbjGXJrp (ORCPT ); Mon, 24 Jul 2023 05:47:45 -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 19D2B1FE5 for ; Mon, 24 Jul 2023 02:46:31 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id d9443c01a7336-1b867f9198dso8894675ad.0 for ; Mon, 24 Jul 2023 02:46:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690191990; x=1690796790; 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=TtWMuwNQICElQwN/uI+F3WL3CTikAs+Dtp5goHq/uX4=; b=I+UdRoo7PtFa/HFb9ptM84BLJk51Oz8G0P2vA9d94Wc/XjfftjzLyxRBwA01anb/sX 9mresCrzzrrBEvcw02T2JRUzwmE2N5g0vsbRd5C+EoXN25pNGYeZ6g16/FMxa3H5VNDH 6ji0rzPXwUbXzJbwXvPiq1FHNNE8ocU8HPGADHiXDhNHZabYES9ASLXofIUnLzuIXCW+ kwLOx4qHBhz6RtbAZxDD88fTSzK7LENJJOn1r+bRhOQmNpcKYfm1Yk1Egb7OAZu9liNf 8Q2C/an05GdrxKmh9WrMTyMLOPzFeZw3WZtFR0oz9alHcEF4Djwn7mAV20C2gc5TCLWm V2MQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690191990; x=1690796790; 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=TtWMuwNQICElQwN/uI+F3WL3CTikAs+Dtp5goHq/uX4=; b=CVmp7+Pd4rYRKnP399o68bdpO50ToGDXLoZ6scuKOmSs6w6NkHUpoN961SydM6fpNr GE9osRpub7rb+/0VqFlg46Z+jYbQFAtYjLdZYO/1WzQiaJ6pq8MVGYD6XVvyYMUtRNqB 0MWJ5EGQms0bg61PBHghXrf+K4ukK2832pLxxeiPoYo+x2A0GWxA11HcB7paSXbaqWLf WsnCFSJXeYYFGMl2jKFLpvLNyM5fb4C5SJ7ziIP4Yut3zan34u21CIaYlYwlaSElv/J0 iYXOctq/Np6GZxuy7ZiltISzbZGerFBwyy1eCAD95/iT2GXzA4rK17aUe5bkGBVfYUUb VWGg== X-Gm-Message-State: ABy/qLZJ2fXEEfvqQdkxNCLV8+MzJmCRBj4EThRRwoCZ7K2h6uAjfFrD URgS9MWhddWA0ngOZF8iNLGoRw== X-Google-Smtp-Source: APBJJlE4z/oQr/nYJvsLLx4ZH1UH5CYL5idBHg9QqjGajgFE/t5dphI4tPFsRKn6N/RjSu5tdTiopA== X-Received: by 2002:a17:902:ecd2:b0:1b8:b4f6:1327 with SMTP id a18-20020a170902ecd200b001b8b4f61327mr12289687plh.6.1690191990533; Mon, 24 Jul 2023 02:46:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id d5-20020a170902c18500b001bb20380bf2sm8467233pld.13.2023.07.24.02.46.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 02:46:30 -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 07/47] xenbus/backend: dynamically allocate the xen-backend shrinker Date: Mon, 24 Jul 2023 17:43:14 +0800 Message-Id: <20230724094354.90817-8-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: linux-btrfs@vger.kernel.org Use new APIs to dynamically allocate the xen-backend shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/xen/xenbus/xenbus_probe_backend.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c index da96c260e26b..b4c3cf27af30 100644 --- a/drivers/xen/xenbus/xenbus_probe_backend.c +++ b/drivers/xen/xenbus/xenbus_probe_backend.c @@ -284,10 +284,7 @@ static unsigned long backend_shrink_memory_count(struct shrinker *shrinker, return 0; } -static struct shrinker backend_memory_shrinker = { - .count_objects = backend_shrink_memory_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *backend_memory_shrinker; static int __init xenbus_probe_backend_init(void) { @@ -305,8 +302,16 @@ static int __init xenbus_probe_backend_init(void) register_xenstore_notifier(&xenstore_notifier); - if (register_shrinker(&backend_memory_shrinker, "xen-backend")) - pr_warn("shrinker registration failed\n"); + backend_memory_shrinker = shrinker_alloc(0, "xen-backend"); + if (!backend_memory_shrinker) { + pr_warn("shrinker allocation failed\n"); + return 0; + } + + backend_memory_shrinker->count_objects = backend_shrink_memory_count; + backend_memory_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(backend_memory_shrinker); return 0; }