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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F748C433F5 for ; Tue, 16 Nov 2021 21:39:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7144D61263 for ; Tue, 16 Nov 2021 21:39:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230367AbhKPVmY (ORCPT ); Tue, 16 Nov 2021 16:42:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:58780 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229710AbhKPVmY (ORCPT ); Tue, 16 Nov 2021 16:42:24 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (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 E73B661A53; Tue, 16 Nov 2021 21:39:25 +0000 (UTC) Date: Tue, 16 Nov 2021 16:39:24 -0500 From: Steven Rostedt To: Sebastian Andrzej Siewior Cc: Joe Korty , Thomas Gleixner , Clark Williams , Jun Miao , linux-rt-users , linux-kernel@vger.kernel.org Subject: Re: [PATCH 5.10-rt+] drm/i915/gt: transform irq_disable into local_lock. Message-ID: <20211116163924.5d5a2ffd@gandalf.local.home> In-Reply-To: <20211116210249.t3f6gw56iaow57mq@linutronix.de> References: <20211007165928.GA43890@zipoli.concurrent-rt.com> <20211007171929.hegwwqelf46skjyw@linutronix.de> <20211009164908.GA21269@zipoli.concurrent-rt.com> <20211116152534.122f8357@gandalf.local.home> <20211116210249.t3f6gw56iaow57mq@linutronix.de> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 16 Nov 2021 22:02:49 +0100 Sebastian Andrzej Siewior wrote: > On 2021-11-16 15:25:34 [-0500], Steven Rostedt wrote: > > I'm looking to see what needs to be added to 5.10-rt. Is there a particular > > fix in one of the 5.x-rt trees (x > 10) that I can pull from? Or is this > > only an issue with 5.10 and below? > > I have this: > https://lore.kernel.org/all/20211026114100.2593433-1-bigeasy@linutronix.de > > pending vs upstream and I *think* more than just that one (2/9 from the > series) needs to be backported here. We do have 1/9 differently in 5.10, > not sure about 4/9. > I would love more feedback here from people and I tried to motivate Joe > to provide some. Clark was so nice to test these patches and provide > feedback. My i915 does not trigger all the code paths I'm touching > there. > > If you think that 2/9 is obvious enough, please go ahead. If you start > touching that irq_work area then you might also want to pick > 810979682ccc9 ("irq_work: Allow irq_work_sync() to sleep if irq_work() no IRQ support.") > b4c6f86ec2f64 ("irq_work: Handle some irq_work in a per-CPU thread on PREEMPT_RT") > 09089db79859c ("irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ on PREEMPT_RT") > > which made their way into v5.16-rc1. > I have a few boxes with i915, that maybe could help in testing. I'll take a look. -- Steve