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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 DFAFFC433E7 for ; Fri, 9 Oct 2020 10:14:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C675222BA for ; Fri, 9 Oct 2020 10:14:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="UDm9MhNS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387546AbgJIKOk (ORCPT ); Fri, 9 Oct 2020 06:14:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731800AbgJIKOj (ORCPT ); Fri, 9 Oct 2020 06:14:39 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE917C0613D4 for ; Fri, 9 Oct 2020 03:14:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=41G919/IDE6Dv+b4JHmasARImUNHzPwDNY0svliXrek=; b=UDm9MhNS7Z1ihWN9Kp3GphpXuN bXkVs+PRnP52IDnuKFmr/a/sgrvO7O3an7fY+JW947eb/IJYfWnVugNKE3VYXOHomiBtspBMCq9xo N5rth3PFFri+Ce8m0+hgiXn2XT8piTmll9koYH/Rlem3uNVoGRyTInbIqI8ONp8ZEXJIqdmQYqC/3 KoOH8nN/CPJ8a2y86iAp/wiYu9+MSJU6GfC1Z3TADzSvcVa2QZ4AzI//0Wwk2qQGb3luBhguIsBWI s17R+vPe3t2WIkDJCiXTGxTFrzmLYpvvVVHUpdKw4PjGbaa/VtkOa0WSBCWBdUFQHHqjM7ecGzFfQ Yagc8zVg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kQpQ3-0006wd-58; Fri, 09 Oct 2020 10:14:35 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 8FDCD3056DE; Fri, 9 Oct 2020 12:14:31 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 8317820DB441C; Fri, 9 Oct 2020 12:14:31 +0200 (CEST) Date: Fri, 9 Oct 2020 12:14:31 +0200 From: Peter Zijlstra To: Michal Hocko Cc: Thomas Gleixner , Frederic Weisbecker , LKML , Mel Gorman , Ingo Molnar Subject: Re: [RFC PATCH] kernel: allow to configure PREEMPT_NONE, PREEMPT_VOLUNTARY on kernel command line Message-ID: <20201009101431.GJ2628@hirez.programming.kicks-ass.net> References: <20201007120401.11200-1-mhocko@kernel.org> <20201009091218.GF4967@dhcp22.suse.cz> <20201009094245.GG2628@hirez.programming.kicks-ass.net> <20201009101044.GH4967@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201009101044.GH4967@dhcp22.suse.cz> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 09, 2020 at 12:10:44PM +0200, Michal Hocko wrote: > On Fri 09-10-20 11:42:45, Peter Zijlstra wrote: > > On Fri, Oct 09, 2020 at 11:12:18AM +0200, Michal Hocko wrote: > > > Is there any additional feedback? Should I split up the patch and repost > > > for inclusion? > > > > Maybe remove PREEMPT_NONE after that? Since that's then equivalent to > > building with VOLUNTARY and booting with preempt=none. > > So do you mean that I should post an additional patch which does this on > top? With a justification that there is one option less to chose from? Exactly!