From patchwork Thu Jul 27 08:04:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329782 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 D2086C001DC for ; Thu, 27 Jul 2023 08:36:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234206AbjG0IgE (ORCPT ); Thu, 27 Jul 2023 04:36:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234163AbjG0Ifq (ORCPT ); Thu, 27 Jul 2023 04:35:46 -0400 Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5EADE61B0 for ; Thu, 27 Jul 2023 01:19:13 -0700 (PDT) Received: by mail-io1-xd34.google.com with SMTP id ca18e2360f4ac-760dff4b701so11310339f.0 for ; Thu, 27 Jul 2023 01:19:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445949; x=1691050749; 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=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=CNVJDRco+AmyZKLGWkxETfqWbx9s8nLuj90PJN+H0vfWfPyTAnUXYXlAShwVoJRcfd /JNECyfi0DlqBrQJFMpVkd4yr4evtMth7ELoagSfCdXVhh5ikmt/ySIOylUV/iqYBuww tpH7p2bj0gKm+TgW6fuXI/oIb5NdJflnKmqQ2Mv8jgOCFbmst6zFCc1vAFEXw3aXyZXo sLVx1dacQPzKGeKlDz3HLAWB00+BwSWj6v63gbIVl85j3wuUL8NvMM4foaWFJI67eKCt gLUnxkB6+jKhm7pNhFf1ALSyy0lKEjRVL3AlwQ/5ubpXs3+Stg6tNZNqaoKqtHvMnJI4 tPWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445949; x=1691050749; 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=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=FMdBr8CLRei+GzN/UGgKRRH9v7xQBJq3r/oul3pMtOGH4YrVE/Zs9/t64VdH9owyLB 8H20P8Iuw3z6dd3p9ozycdsjtnHt6LmqqCsmeDmnxdWgOiY31M1mqpcYzzk0Z2vO1AF2 PM0aTjxkbN9O6GI2CFITLA+hxcyvPA3fdte5po/UAG3oosQ4eiwF1ANHZ/aOZ0AMCr5I rvCQ1pfmIQ+KiaqOoOztCqG91N94hOJdceCQXmwky4Iws5fTvG9UbBgYfwhBlSPaR3nh 8PtIYthjY6vKhfz3cD8Jo7hdFDppvINYw3p20bksV1fGUi9NtzVNzQbUAkMPs3zWQsUS QhSw== X-Gm-Message-State: ABy/qLYCO8VOp0RcNzJm0fYp7eKJ4bXfgZT5A6O4g/F5XBiun5f9cfIy t9XxdyYnDHDc5MecOAmkHkYk4RcBU22PkstWsLY= X-Google-Smtp-Source: APBJJlEtjuu7JvMViG/zI1+BRK6QgnXajX34xFKdSMMqB1WswZOW9mIhLIlLvIrLtx031P4ulw5hGg== X-Received: by 2002:a05:6a20:9381:b0:137:8f19:1de7 with SMTP id x1-20020a056a20938100b001378f191de7mr6160325pzh.0.1690445259706; Thu, 27 Jul 2023 01:07:39 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:39 -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 09/49] xenbus/backend: dynamically allocate the xen-backend shrinker Date: Thu, 27 Jul 2023 16:04:22 +0800 Message-Id: <20230727080502.77895-10-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: 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 | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c index da96c260e26b..929c41a5ccee 100644 --- a/drivers/xen/xenbus/xenbus_probe_backend.c +++ b/drivers/xen/xenbus/xenbus_probe_backend.c @@ -284,13 +284,9 @@ 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 int __init xenbus_probe_backend_init(void) { + struct shrinker *backend_memory_shrinker; static struct notifier_block xenstore_notifier = { .notifier_call = backend_probe_and_watch }; @@ -305,8 +301,16 @@ 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; }