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 97D61C433EF for ; Tue, 14 Dec 2021 19:45:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237514AbhLNTp5 (ORCPT ); Tue, 14 Dec 2021 14:45:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234555AbhLNTp4 (ORCPT ); Tue, 14 Dec 2021 14:45:56 -0500 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5BE1C061574; Tue, 14 Dec 2021 11:45:56 -0800 (PST) Received: by mail-pj1-x1034.google.com with SMTP id f18-20020a17090aa79200b001ad9cb23022so16945747pjq.4; Tue, 14 Dec 2021 11:45:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=WXQ4L3qp7NpGXbdQ/vd/POJH3pL/Rk5cETFAlE06wQg=; b=amqRniWefUWtIJ056Oy+3xDZEqFPheGvE9Orcx+F0E4zfdLvUazfQwtYHPu5kjhhAI ofBNdFsIW7gp8WJfw4oI/yZSbxVjS29P+EKk9S+qTHMiGxouTUqfZYmPBVgcdvqpd86h eaNolPyGzpGa3eWbqupzQv8eK969rcD/Bf8Cv6aXU2Clw+4iqUKy2oGW8XwlpM8s1n7c q7uw2Zk9YV2J56oHbmmBM8Nf6UuLo3qUo8r+Uwp3F+MRoS3Xune4T/fBXoByn2sRE0QQ KEJOoNUFEq/SvDfmUUp/35n53pN6BQxu7/J084YlL66sHAjS8J6XXd+m7UradoS8Ge9n eo+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=WXQ4L3qp7NpGXbdQ/vd/POJH3pL/Rk5cETFAlE06wQg=; b=V/lioLayIg6yxK0/3FaEk1h3A03u7XDZ2IiZdkvnaOlbEuIkscDfk9UpOn5YBKw7cv qjHzLKbr6MaAU3/VaValny9lpTX4fl9d8PCLhIzvaNopa9SQdn9KqAU+sHVQ2KgM5U88 DKHkYcKVOYwiXuCe5sQPjBYxHB4bIkKu4ONtFyIq358RmMMJ1YwDUksVXb9bSWRMm+sS qrcx33t3ACgFll78urATicWTLOTi9lJ/GeyY6p3jGbOn2qKPQlm98yKRmtc4D7dvXll5 zdVe9SmdaUqeScBSbYIMkqJWkiH44QtlcXNJ79XBRjtsEDYYNr6aSiq9JRyGUxYilt1y gKcg== X-Gm-Message-State: AOAM532w2oDwyvcDfqlpqee8f/WH0JSHC7c1cwV0IFRT+mA2WDbxspvi OtMv3SKj3jeY+Yic8Z8cAN8XS4o6kFs= X-Google-Smtp-Source: ABdhPJxJ4asMv9j+aC7K/2DaOHbqW56OIIjUP9y4PFtJOggcjiRcfYS3c5sBD6qydPRohZqm3kheOg== X-Received: by 2002:a17:902:7281:b0:148:a2e8:279d with SMTP id d1-20020a170902728100b00148a2e8279dmr964608pll.164.1639511156119; Tue, 14 Dec 2021 11:45:56 -0800 (PST) Received: from localhost (2603-800c-1a02-1bae-e24f-43ff-fee6-449f.res6.spectrum.com. [2603:800c:1a02:1bae:e24f:43ff:fee6:449f]) by smtp.gmail.com with ESMTPSA id w19sm465696pga.80.2021.12.14.11.45.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 11:45:55 -0800 (PST) Sender: Tejun Heo Date: Tue, 14 Dec 2021 09:45:54 -1000 From: Tejun Heo To: Wei Yang Cc: lizefan.x@bytedance.com, hannes@cmpxchg.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [Patch v2] cgroup: return early if it is already on preloaded list Message-ID: References: <20211214004607.9296-1-richard.weiyang@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211214004607.9296-1-richard.weiyang@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 14, 2021 at 12:46:07AM +0000, Wei Yang wrote: > If a cset is already on preloaded list, this means we have already setup > this cset properly for migration. > > This patch just relocate the root cgrp lookup which isn't used anyway > when the cset is already on the preloaded list. > > [tj@kernel.org: rephrase the commit log] > > Signed-off-by: Wei Yang Applied to cgroup/for-5.17. Thanks. -- tejun