Received: by 2002:a25:8b12:0:0:0:0:0 with SMTP id i18csp1267682ybl; Fri, 23 Aug 2019 16:33:39 -0700 (PDT) X-Google-Smtp-Source: APXvYqzSgWmHWvarMtBIfqhRbOR1wF4yU90Z/z7ATQSzJEHTnfcWTpDi8xqScxvbdrZXX8PYVDtM X-Received: by 2002:a17:90a:2629:: with SMTP id l38mr7943727pje.71.1566603219108; Fri, 23 Aug 2019 16:33:39 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1566603219; cv=none; d=google.com; s=arc-20160816; b=mpy8DT3cgo0Gcw4bAtQArS0/P9N0vJMDTHZ6kZRW04mlLzLxKPIIpyb5pn0Y7aiWfB B5/VJpjklwdiP6HOw1XSReWLqBCsyrPPnKSWcZ6RIS7NCzF+QzpeHsQK5PXl19oQuv6d bzfSLxpL1Y7Ht3g7NvXmbPcuFNNJIR34fjdDt1fMet1qd7Kvv47EsapEt1LDvK5/lvLx Yo288UA6eev0lZD8ZNzyMgL9gKplyEHtPvP5H/nN0AUvAaG9v67CYEcvTPAmWvefi40L JEFzDgXmzAI1f/qagqfx3NNIkQ7oqW0GDXvM5SudVKIyWFJIuxhPXBoYc30jCUsKpfq7 1wTg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-transfer-encoding:content-disposition:mime-version :references:message-id:subject:cc:to:from:date; bh=JoJYcucpJSReQmha9dGKaKowtYXa8FNCmjc3ccwGB5o=; b=VRQZHTxHg4Js1a2q7WqOxatZaganTFuBDmJmTSTbWdOQh+MrjGOoo3XjdiqaxzZJir VAZs6084xnjNOnfN0DSZyt6neC+HQBkhpN6kbX62JaG77/YAC92wxcfbihfjv/5CFryY tFJ27c1epGOku4SfD7KAgtBVLvEkOyj0ospIaqvgk8Bv4gdPGUpb0w+arNiVrXOB4EWZ dmJKlqXdNqFWX+oDwwe+Py0PXT2vK1Hy8Wdg3c32jKQx411js0IjrGYW/wQTixpQ/1Dl +r4eKQDcGXBvZ8ivFH9up8h+rxu5BmShkxB0D1mL+Fh1mKWyeCNNCToQ68jX3Fju7SXw P6xg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a24si3886105pfi.205.2019.08.23.16.33.24; Fri, 23 Aug 2019 16:33:39 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2436745AbfHWQcf convert rfc822-to-8bit (ORCPT + 99 others); Fri, 23 Aug 2019 12:32:35 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:36275 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726964AbfHWQcf (ORCPT ); Fri, 23 Aug 2019 12:32:35 -0400 Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1i1CUK-00061b-MW; Fri, 23 Aug 2019 18:32:32 +0200 Date: Fri, 23 Aug 2019 18:32:32 +0200 From: Sebastian Andrzej Siewior To: "Paul E. McKenney" Cc: Scott Wood , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org, Joel Fernandes , Thomas Gleixner , Peter Zijlstra , Juri Lelli , Clark Williams Subject: Re: [PATCH RT v2 3/3] rcu: Disable use_softirq on PREEMPT_RT Message-ID: <20190823163232.zvs3gdcf2sxffbg5@linutronix.de> References: <20190821231906.4224-1-swood@redhat.com> <20190821231906.4224-4-swood@redhat.com> <20190821234018.GW28441@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: <20190821234018.GW28441@linux.ibm.com> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019-08-21 16:40:18 [-0700], Paul E. McKenney wrote: > Save a couple of lines? > > static bool use_softirq = !IS_ENABLED(CONFIG_PREEMPT_RT_FULL); > > And if I understand your point above, the module_param() might be > able to be the same either way given the new RCU. But if not, > at least we get rid of the #else. I *think* we wanted this. And while I took the RCU patches for v5.2 I forgot to enable it by default… > Thanx, Paul Sebastian