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 D3108C4363D for ; Wed, 23 Sep 2020 15:27:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A50C2220D for ; Wed, 23 Sep 2020 15:27:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600874870; bh=A9Ugg4oU2VmNaDr0WzeN90XxWgTy3c5sTu4Av4xNrSo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=UjNkGVl+fe3iwygG8Ph8DgtPnhWoWHO2vf/xvPxHrqWw7etURYt5WPeVDk+Lqey16 /u53DKykElVsi9D/aGuSTELvqVDQp6XPKFjGM0BpeM/bJM44FN+rdzQgnysHlZ69Uj fOS0AS9uh28N4qegRW0OE/UGe5Rm6SbOJeWbyVpw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726727AbgIWP1t (ORCPT ); Wed, 23 Sep 2020 11:27:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:54704 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726184AbgIWP1s (ORCPT ); Wed, 23 Sep 2020 11:27:48 -0400 Received: from localhost (lfbn-ncy-1-588-162.w81-51.abo.wanadoo.fr [81.51.203.162]) (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 D716F2137B; Wed, 23 Sep 2020 15:27:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600874868; bh=A9Ugg4oU2VmNaDr0WzeN90XxWgTy3c5sTu4Av4xNrSo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=qt7PfRGOdRelYc1bYQ4AfVzekaexSDD0WKpD7pcHFEl43fPI5cL+Ni+G6oCH9ybOO IVB7NyrHi3v/gvc7RTlqYE2nOYldMBMVeOja+M/khFNsvep1woHL571R2za9xWCHRR TXJzLCPswrqcNzMSk2k7oEVkWz6TkkJokvZwZPbg= Date: Wed, 23 Sep 2020 17:27:46 +0200 From: Frederic Weisbecker To: "Paul E. McKenney" 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: <20200923152745.GB31465@lenoir> References: <20200921124351.24035-1-frederic@kernel.org> <20200921124351.24035-13-frederic@kernel.org> <20200922002629.GS29330@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200922002629.GS29330@paulmck-ThinkPad-P72> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. > > All questions and concerns aside, excellent progress and nice work!!! Thanks! We are slowly making progress :)