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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 BB351C2D0A8 for ; Wed, 23 Sep 2020 15:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 81673235FC for ; Wed, 23 Sep 2020 15:47:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600876038; bh=IC7mRUIGiq0ZAjZpZYLZt/JB2jFru3rkHdDPayZQEvw=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=L81YzQgYBiZRNABx6pTwi0ZehR5En3889OGEO4mjmsFfhbKK3K4ADe8DuGfwiUvw9 nqbjFt2SE/bQXaSMdoInsrBOA9Onevt7v9g7++aNc1l+/b7UAhG+olECfrVSsfiwSQ tfzPw9gxdOtFTXaMdI1N2Ldg8Yqz3MB3qNHMq70U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726744AbgIWPrR (ORCPT ); Wed, 23 Sep 2020 11:47:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:51320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726130AbgIWPrR (ORCPT ); Wed, 23 Sep 2020 11:47:17 -0400 Received: from paulmck-ThinkPad-P72.home (unknown [50.45.173.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 705D22223E; Wed, 23 Sep 2020 15:47:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600876036; bh=IC7mRUIGiq0ZAjZpZYLZt/JB2jFru3rkHdDPayZQEvw=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=brzfnKcDaKGSrL5CoeZS/yYeUZF3i5CUX+IAZg9+1ukDRJ8/pB+qsmzoxQFQ1oVyQ QeanuPVtZHSGMebiqQrg3khioRv9Q28Vu60X1TGQoI4q6Yn2GpdnVyyhW/SAPXMfS8 DK94QeIaRyK3kaRGmzFqfcwH11JO2Jaglfcz/9es= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id 454C335226CB; Wed, 23 Sep 2020 08:47:16 -0700 (PDT) Date: Wed, 23 Sep 2020 08:47:16 -0700 From: "Paul E. McKenney" To: Frederic Weisbecker Cc: LKML , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Joel Fernandes , Josh Triplett Subject: Re: [RFC PATCH 12/12] rcu: Nocb (de)activate through sysfs Message-ID: <20200923154716.GP29330@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20200921124351.24035-1-frederic@kernel.org> <20200921124351.24035-13-frederic@kernel.org> <20200922002629.GS29330@paulmck-ThinkPad-P72> <20200923152745.GB31465@lenoir> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200923152745.GB31465@lenoir> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 23, 2020 at 05:27:46PM +0200, Frederic Weisbecker wrote: > On Mon, Sep 21, 2020 at 05:26:29PM -0700, Paul E. McKenney wrote: > > On Mon, Sep 21, 2020 at 02:43:51PM +0200, Frederic Weisbecker wrote: > > > Not for merge. > > > > > > Make nocb toggable for a given CPU using: > > > /sys/devices/system/cpu/cpu*/hotplug/nocb > > > > > > This is only intended for those who want to test this patchset. The real > > > interfaces will be cpuset/isolation and rcutorture. > > > > Excellent choice for testing in the near term! > > > > How does rcutorture fare with this series if an additional kthread toggles > > offloading on and off continually? > > So yeah that would be the plan: having something that randomly toggles > offloading from the RCU tests themselves. I'm not quite familiar with > rcutorture internals yet though. If you supply a function that selects a CPU and does the toggle, I can quickly and easily wire it into rcutorture. I of course have no objection to your learning to do this yourself, but the offer stands. > > All questions and concerns aside, excellent progress and nice work!!! > > Thanks! We are slowly making progress :) Better than quickly failing to make progress, to be sure! ;-) Thanx, Paul