From mboxrd@z Thu Jan 1 00:00:00 1970 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2097EC77B7F for ; Fri, 5 May 2023 15:19:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 71C816B0081; Fri, 5 May 2023 11:19:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6CBAD6B007E; Fri, 5 May 2023 11:19:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5E2526B0081; Fri, 5 May 2023 11:19:14 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) by kanga.kvack.org (Postfix) with ESMTP id 331C76B007D for ; Fri, 5 May 2023 11:19:14 -0400 (EDT) Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-63b5ce4f069so2082645b3a.1 for ; Fri, 05 May 2023 08:19:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683299953; x=1685891953; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:sender :from:to:cc:subject:date:message-id:reply-to; bh=QrpziiuRPJpNoKcFlKlNDYP3hr3GKLDf970mOGtKvuc=; b=Fj4FzNjR0Oz19A6ZjISxtRCIB+gQ3mormqowoEF1ln4EAGyvrsBXyRSKbqhyQLC+in o5fjKNvQ/yN0VkIUe2FBxZQFo8CuBxoJ2BHDLSjYh8+HdnZ3QVP+E3dS2Plzshy/p0pl Hf+Ipbvxtcy7Hi/3cT8d8Gb8J4VkAhSsEMdiy5ZKUcaPh932ZSd20eO3fYebZugEA49X mUUklW5aR3Rdjne/IP0kOlzyLqAlnitsZ0Nl/BTITfGcIQAdz5oicdNCa7j+DyuEkA1C Vd0a06+ACDVmjHz4Tb9Av8qWUmDjShH/SvaPwFsAA9tTqizN1m3Qn5TBxTXirG2Ivak4 dJgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683299953; x=1685891953; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:sender :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QrpziiuRPJpNoKcFlKlNDYP3hr3GKLDf970mOGtKvuc=; b=ZKD6DISqRznMgdfDjZXL7fh2GEiXCTxVRN+h5qUNTRMxZY4LsHgVXawqzok07wyThe 71Kc4OedHRakP6lm582sNmMofMsWLNw9S+0IZTXVgWDX6OuVhVA4pc0Gfxu2e05QUYWs PiucyvPjrJbPylWVK+dKKwJ86xMlWaRjLdekIgPqj0EfVr9j1TihC8tKOvNKYZnLM4o7 e04d7cy/6pl+cXwqczx8KgILROf3y8/KoACQjefR9AnzbaJEEiEoPEzLpLVJpZvzGlN+ dQHXTK+jXH+pgJlxed82bjn7gt3nLKktMnIXE8Wb0rkrJkpCfQTJquGAeUvelrMvDEbJ Yg2w== X-Gm-Message-State: AC+VfDzxJCzYblSs25iiZlxzsv8SmMsi5WQyJAPmZCHmCbgCrtnyyYu5 YwAoO9CMYlliclAcnatNH1w= X-Google-Smtp-Source: ACHHUZ4oWHVbIQ4Y2X7zP+W64RCijgfgCdZHzfbuwUZyVuydxCxdQ1UzZ4jatoAtiD6Cz2rxTAqKgw== X-Received: by 2002:a05:6a20:1583:b0:f2:3c0e:99fa with SMTP id h3-20020a056a20158300b000f23c0e99famr2447784pzj.26.1683299953266; Fri, 05 May 2023 08:19:13 -0700 (PDT) Received: from localhost (2603-800c-1a02-1bae-a7fa-157f-969a-4cde.res6.spectrum.com. [2603:800c:1a02:1bae:a7fa:157f:969a:4cde]) by smtp.gmail.com with ESMTPSA id t9-20020a170902b20900b001960706141fsm1939802plr.149.2023.05.05.08.19.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 May 2023 08:19:12 -0700 (PDT) Date: Fri, 5 May 2023 05:19:11 -1000 From: Tejun Heo To: Yosry Ahmed Cc: Alexander Viro , Christian Brauner , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , Jan Kara , Jens Axboe , Michal =?iso-8859-1?Q?Koutn=FD?= , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v5 2/5] memcg: flush stats non-atomically in mem_cgroup_wb_stats() Message-ID: References: <20230421174020.2994750-1-yosryahmed@google.com> <20230421174020.2994750-3-yosryahmed@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230421174020.2994750-3-yosryahmed@google.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Apr 21, 2023 at 05:40:17PM +0000, Yosry Ahmed wrote: > The previous patch moved the wb_over_bg_thresh()->mem_cgroup_wb_stats() > code path in wb_writeback() outside the lock section. We no longer need > to flush the stats atomically. Flush the stats non-atomically. > > Signed-off-by: Yosry Ahmed > Reviewed-by: Michal Koutný > Acked-by: Shakeel Butt Acked-by: Tejun Heo Thanks. -- tejun