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 D347BC433EF for ; Fri, 27 May 2022 00:37:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230242AbiE0Ahh (ORCPT ); Thu, 26 May 2022 20:37:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbiE0Ahe (ORCPT ); Thu, 26 May 2022 20:37:34 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 787332FE68; Thu, 26 May 2022 17:37:32 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id cs3-20020a17090af50300b001e0808b5838so3049633pjb.1; Thu, 26 May 2022 17:37:32 -0700 (PDT) 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=o8YtTw+oDCXU/4zH8awJvWQVJSa2A0oeSPAlTFu35oc=; b=XysUOxsCZTA4tY9LMzb0tMf+3Q+xmUq8iL386QEmY+GPfU5w0ZDUuhP8a7/bk0pLP4 iKk2pQ+bqHy0mHg9MLGvB2r8XnZFkKmle+A2W7bqbtpUxDKzghor2G02oa0dn9OmGLrv SRn/25vXXOSBzAavHMbf8VavHPLLrIWi/r0zrsY6gCsa+zSuoXMb57SeEMtnfOuzXEgy 0ZALNkPYwL8l1TWuQ4OiZSS23scBBmjRPwXh92M4yjJ7wclxwtnzumuTnWPwHsLpWkAe 2d812mErgNGeiW74n4tc2PGTYZ03ay6a92jC79uVGiUoBB9U21SZRU6u8IIX21CTs35R q0XQ== 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=o8YtTw+oDCXU/4zH8awJvWQVJSa2A0oeSPAlTFu35oc=; b=cQZVKRl1+30DIEjsNb8HeBNAHDe+1symEBzI5ICRc29gvQqwg1KgPSIAbr9XMA5je+ 5/dIlPP2GiAFXFwjrfdnvr/emvzD67wQpsnKoPU/c6Wzp3wQ8eBKpOG5pE0JqYcKTBg+ BcxQaGgTE+atzSwHIwnCe4EbqvAAy8uFZNnFaPXi/uNNPJ0OUNsqtdl8zdd2/6Dx9BKU lQB34UEiNR5RxBAtN2VTWl4wl8L0oZTREFvHMFdtcvolqrf9tcSKSEQfsU4iYTWCZlaL D67zLaaSNkUPRg0aR9xLOY8UWvishSo6hUQCthu5Q73GidykutCAWWGe4yDZOotaJJty XrRg== X-Gm-Message-State: AOAM531201tmaM51Qg4/63D/1YcOePRpvqUvrT8kNgdinl5742Jb+ZmP rekM1CC/8prXHpAqc9UpHQg= X-Google-Smtp-Source: ABdhPJxv24rJD58rDnyXaJGBU6rRUJs7YcEj2PS7/yxvHNWfDAx2pYPKbR8RP2moU7m/x+FiYxiQyw== X-Received: by 2002:a17:90b:3510:b0:1e0:b82:7558 with SMTP id ls16-20020a17090b351000b001e00b827558mr5354821pjb.21.1653611851658; Thu, 26 May 2022 17:37:31 -0700 (PDT) Received: from localhost ([2620:10d:c090:400::4:ac0e]) by smtp.gmail.com with ESMTPSA id i16-20020a170902cf1000b00161929fb1adsm2176193plg.54.2022.05.26.17.37.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 May 2022 17:37:31 -0700 (PDT) Sender: Tejun Heo Date: Thu, 26 May 2022 14:37:29 -1000 From: Tejun Heo To: Waiman Long Cc: Frederic Weisbecker , LKML , Peter Zijlstra , "Paul E . McKenney" , Paul Gortmaker , Johannes Weiner , Marcelo Tosatti , Phil Auld , Zefan Li , Daniel Bristot de Oliveira , Nicolas Saenz Julienne , rcu@vger.kernel.org Subject: Re: [RFC PATCH 4/4] cpuset: Support RCU-NOCB toggle on v2 root partitions Message-ID: References: <20220525221055.1152307-1-frederic@kernel.org> <20220525221055.1152307-5-frederic@kernel.org> <20220526225141.GA1214445@lothringen> <9e44bb00-955a-dbc6-a863-be649e0c701f@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9e44bb00-955a-dbc6-a863-be649e0c701f@redhat.com> Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org On Thu, May 26, 2022 at 08:28:43PM -0400, Waiman Long wrote: > I am thinking along the line that it will not be hierarchical. However, > cpuset can be useful if we want to have multiple isolated partitions > underneath the top cpuset with different isolation attributes, but no more > sub-isolated partition with sub-attributes underneath them. IOW, we can only > set them at the first level under top_cpuset. Will that be useful? At that point, I'd just prefer to have it under /proc or /sys. Thanks. -- tejun