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 43B46C433EF for ; Thu, 7 Oct 2021 17:19:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24C0661058 for ; Thu, 7 Oct 2021 17:19:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243237AbhJGRVq (ORCPT ); Thu, 7 Oct 2021 13:21:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243233AbhJGRV2 (ORCPT ); Thu, 7 Oct 2021 13:21:28 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 345EFC061570; Thu, 7 Oct 2021 10:19:34 -0700 (PDT) Date: Thu, 7 Oct 2021 19:19:29 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1633627171; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1wBNXpOyOE9HM/ZxKmlXobh0LUJjnX0lvRptKFcJ9OM=; b=CplXng9MzFaWzWLGbE7dbGYVRiEz9vM+u23h7FsSuYGIATEg10B2TooG22kkSAGJ20c2tY kO18pOcumb/6I9CoSGe4PnHi1cjlYlT3lQ0KMXdj13lwUEawnvhm73LHno9WpsP9L7+udR CGnX7c4payqQPFfWHCx/dA3c2WpX3Fp1ELSmM5Ttnce0ypdJ8dRmqeB3xG5nzmR/MT23eF vv2B85aL7V2SMTmu7yya3XqVQh3102h22WfSBEHJBqLAlSZ18I+17NWgxHMbx8aol2HDDk XOJ66uvBHMXSXE7W8uK7PZv/Q1PphCbVQQ0ERi6CWaRxBdrdiCAtGA2N3PBnvg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1633627171; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1wBNXpOyOE9HM/ZxKmlXobh0LUJjnX0lvRptKFcJ9OM=; b=d7CGKbpnAf0ir+dumPZAcFuOBpLbCt/4ajaYrOsBVgdTNM/oeZSOm+W1Vwr+yC6HpHdzME kph48471npeMewBg== From: Sebastian Andrzej Siewior To: Joe Korty Cc: Thomas Gleixner , Steven Rostedt , 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: <20211007171929.hegwwqelf46skjyw@linutronix.de> References: <20211007165928.GA43890@zipoli.concurrent-rt.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20211007165928.GA43890@zipoli.concurrent-rt.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2021-10-07 12:59:28 [-0400], Joe Korty wrote: > Convert IRQ blocking in intel_breadcrumbs_park() to a local lock. >=20 > Affects 5.10-rt and all later releases, up to and including when > rt was merged into mainline. RT was merged into mainline? Nobody tells me anything anymore=E2=80=A6=20 > This problem has been reported in two other linux-rt-users postings, > =20 > [PREEMPT_RT] i915: fix PREEMPT_RT locking splats (Clark Williams) > [linux-5.12.y-rt] drm/i915/gt: Fix a lockdep warning with interrupts e= nabled (Jun Miao) >=20 > Neither of these submit the obvious solution, nor, > AFAICT, has either yet been acted on. So I muddy the > waters further by submitting this, a third fix. 5.12 is longer maintained. Could you please take the latest devel tree for testing and participate in https://lore.kernel.org/all/20211005150046.1000285-1-bigeasy@linutronix.d= e/ ? If anything I would prefer those patches backported into v5.10 if it is affected. Sebastian