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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38F71C04A68 for ; Thu, 28 Jul 2022 17:27:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232695AbiG1R1b (ORCPT ); Thu, 28 Jul 2022 13:27:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232571AbiG1R12 (ORCPT ); Thu, 28 Jul 2022 13:27:28 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FBCABF44; Thu, 28 Jul 2022 10:27:28 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id x10so1669264plb.3; Thu, 28 Jul 2022 10:27:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc; bh=VbEpbcnRCKhYT7BZ0HSKVgFvbMAakayClnOZvBHVLDM=; b=i00rVjg3DaYMhQYt2uaTPpDZXUdlQ+KaCLpjoz3IEIhO1KJkqSkwWpy1/U7Uf/F/aD nmFgTkH1TiexdN5J0xFNoxsNwasPcbARyEDdluyAxzkqtOoUZni9gh2nJsVmmZVUf4Xt cV/aq3fSAIIAqz8k9rp+jo+k1XdHNaYlqrx0nfsdz0stk4DaDTrhBl4iyUw7qpidmOac GGvOSFwVaZrE6LDxLSV1yebcuuUAeZ3zPpMZWUBNFispkFDqlVx2Rk5aLw7LNWPr+Tw7 ldPZYan//l8svd7n01XrDz4bRjQrKC3gazwQ+N+G9xjNJxI+R0+fooIua330gEkmXpku 6JWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc; bh=VbEpbcnRCKhYT7BZ0HSKVgFvbMAakayClnOZvBHVLDM=; b=YnsCkskJY6Q5ebe6ZSvcmHnQMwriBaQ+jnMKwm+BEp9S90a0anBmTsnHePxanFAK6A mayuBBCLRAzNBgU1SveLqaIG+P7n/unFD+bXj9Z/kpESOX9iEgZMkhDBS/XPls+dpIz+ EeZ7MIm0guE+YELKT0Ib8VWNEN2Dgprm3Z0Y9R/QHSYlG5Y6sytLQnh0AUY0lwAJYdVI NVU3tcyW9/HUMiTA03ypNwrgfhBoJ0aN8nxCB5rr2xGtoykq3f1o1stpZpakiQoOO8x/ y9HKll6k6qynWjh3HT/IDTRSahR1A4bNXabaNQbIsLsASMR7tI9BSzZmbRg7d7xbJTyP xbxw== X-Gm-Message-State: AJIora9nqhHEqt+oODMkXzH8nk2IGOYljrdEjRl3djZKTnHkzmJGThDU y6kvt7yP6ph4myQn1q8z0KI= X-Google-Smtp-Source: AGRyM1u5+4hMr4oZu9issv6Q/ERTdCcJGxEq3gDZsmq0mWG7JasQl8j1W+FQA8t4s9nHhjTnafpYvw== X-Received: by 2002:a17:902:bd8a:b0:16c:dfcf:38ba with SMTP id q10-20020a170902bd8a00b0016cdfcf38bamr26699504pls.35.1659029247629; Thu, 28 Jul 2022 10:27:27 -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 m5-20020a170902f64500b0016cd74e5f87sm1546605plg.240.2022.07.28.10.27.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Jul 2022 10:27:27 -0700 (PDT) Sender: Tejun Heo Date: Thu, 28 Jul 2022 07:27:25 -1000 From: Tejun Heo To: Waiman Long Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Zefan Li , Johannes Weiner , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] cgroup: Skip subtree root in cgroup_update_dfl_csses() Message-ID: References: <20220728005815.1715522-1-longman@redhat.com> <20220728005815.1715522-2-longman@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220728005815.1715522-2-longman@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 27, 2022 at 08:58:15PM -0400, Waiman Long wrote: > The cgroup_update_dfl_csses() function updates css associations when a > cgroup's subtree_control file is modified. Any changes made to a cgroup's > subtree_control file, however, will only affect its descendants but not > the cgroup itself. So there is no point in migrating csses associated > with that cgroup. We can skip them instead. > > Signed-off-by: Waiman Long Applied to cgroup/for-5.20. Thanks. -- tejun