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=-17.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 F14C9C433E0 for ; Tue, 9 Mar 2021 21:33:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C242364F60 for ; Tue, 9 Mar 2021 21:33:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232051AbhCIVcm (ORCPT ); Tue, 9 Mar 2021 16:32:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:60232 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232043AbhCIVc3 (ORCPT ); Tue, 9 Mar 2021 16:32:29 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8C11264F59; Tue, 9 Mar 2021 21:32:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615325549; bh=X/NHyrXhlVVZOYp7ag0+RL8Aeg36G7MdG2rUBg2zpaw=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=bo9G9gFvOatOBnUAaD9wq3s0emeAmjg4uxyUJgQ+FEd1Yr5FQS1iibDIC6M5aNSY0 Etib3ZaimejCVzYUXfrlWeJzAQFwPgtTzlezG56bXtGwYT/84fqmz0nNZQPV6xbx/h S70i6G17sk7QeSNpBwSaF3eKktYAwXd5kR0gTXNgcU2QYmIedOneJ7yLDTNg+RfqQG 5Bf9I1GfOX/HwM/mq36Qgf47K4ArKnLrmExALI/qEoUoDeHz2C3pOOS1IfyA3pxyEW 0XvVHokiITO/ik9BHCImIBk7GA/XU/9Xhjbs/71gTuWZ9qn7qrrDOKF9BIjo8IeMb2 b3F9AVclM+hxw== Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id 4EAE335239E0; Tue, 9 Mar 2021 13:32:29 -0800 (PST) Date: Tue, 9 Mar 2021 13:32:29 -0800 From: "Paul E. McKenney" To: Thomas Gleixner Cc: LKML , Peter Zijlstra , Sebastian Andrzej Siewior , Frederic Weisbecker Subject: Re: [patch V3 0/6] softirq: Add RT specific softirq accounting Message-ID: <20210309213229.GT2696@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20210309085552.815026890@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210309085552.815026890@linutronix.de> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 09, 2021 at 09:55:52AM +0100, Thomas Gleixner wrote: > RT runs softirq processing always in thread context and it requires that > both the softirq execution and the BH disabled sections are preemptible. > > This is achieved by serialization through per CPU local locks and > substituting a few parts of the existing softirq processing code with > helper functions. > > The series applies on top of > > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git tasklet-2021-03-09 > > and is completely available from: > > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git softirq > > Changes to V2 which can be found here: > > https://lore.kernel.org/r/20201204170151.960336698@linutronix.de > > - Split the tasklet changes out (seperate submission) > > - Rebase it on the tasklet series (no further changes) Passes modest rcutorture testing, and I do like the "NOHZ tick-stop error" maybe going away! That error is rare enough that it will take some time to be reasonably certain. In the meantime: Tested-by: Paul E. McKenney