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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADB1AC433E0 for ; Wed, 10 Feb 2021 16:29:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 637A964E74 for ; Wed, 10 Feb 2021 16:29:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232350AbhBJQ3E (ORCPT ); Wed, 10 Feb 2021 11:29:04 -0500 Received: from mga14.intel.com ([192.55.52.115]:56763 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232273AbhBJQ3A (ORCPT ); Wed, 10 Feb 2021 11:29:00 -0500 IronPort-SDR: CiItd527TcV6KZg/uwUNFDygSb5jbnlpqouA+hoXKOFdSXHlJoW4jRXk+ndEz1zvKtETZmJ4jN 8Dju+V0O7uxQ== X-IronPort-AV: E=McAfee;i="6000,8403,9891"; a="181329195" X-IronPort-AV: E=Sophos;i="5.81,168,1610438400"; d="scan'208";a="181329195" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Feb 2021 08:27:00 -0800 IronPort-SDR: iDCFj3FScJh1aCbM/3YQ2GQ7n7Pnt11AD+MDLAGiNS+TicXC0tGpJumUeFAluf+0ZPN+13aGKP uwSkK26rRasw== X-IronPort-AV: E=Sophos;i="5.81,168,1610438400"; d="scan'208";a="510436292" Received: from smile.fi.intel.com (HELO smile) ([10.237.68.40]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Feb 2021 08:26:57 -0800 Received: from andy by smile with local (Exim 4.94) (envelope-from ) id 1l9sKM-003lpV-5i; Wed, 10 Feb 2021 18:26:54 +0200 Date: Wed, 10 Feb 2021 18:26:54 +0200 From: Andy Shevchenko To: Paul Gortmaker Cc: linux-kernel@vger.kernel.org, Li Zefan , Ingo Molnar , Yury Norov , Thomas Gleixner , Josh Triplett , Peter Zijlstra , "Paul E. McKenney" , Frederic Weisbecker , Rasmus Villemoes Subject: Re: [PATCH v4 0/8] support for bitmap (and hence CPU) list "N" abbreviation Message-ID: References: <20210209225907.78405-1-paul.gortmaker@windriver.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210209225907.78405-1-paul.gortmaker@windriver.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 09, 2021 at 05:58:59PM -0500, Paul Gortmaker wrote: > The basic objective here was to add support for "nohz_full=8-N" and/or > "rcu_nocbs="4-N" -- essentially introduce "N" as a portable reference > to the last core, evaluated at boot for anything using a CPU list. I thought we kinda agreed that N is confusing and L is better. N to me is equal to 32 on 32 core system as *number of cores / CPUs*. While L sounds better as *last available CPU number*. -- With Best Regards, Andy Shevchenko