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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8D093C433F5 for ; Mon, 28 Feb 2022 10:10:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9BEB010E365; Mon, 28 Feb 2022 10:10:54 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1DCCB10E27F; Mon, 28 Feb 2022 10:10:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646043053; x=1677579053; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=wfW/1ygdW4ocCekKsAsymLglpQ9CvgglisNmxrARh7o=; b=U8JuU5WvQGTKJuOIa6OcMmeHIq7kXO9pQJp1NcK9NhUDHyXBVR5XWorS RfHxlA4mWVqEkQZK5Whr55O1B32QCjnD9dkwCZi4D6meQvwYDAD2VjMp4 bmkJ1TeSCtv3P5al7qmprCXK+hyI7X2s8M1N7rR8KnpSPR8cTVNTgu+s/ chvCLzLdJKsd1TFIgsxUo7rGR/l8P9wa+/P9WCBmyK4IzZ/zqDzpNlPG7 TVxG4rQBmGVFx4RWNL1wpfX4MAJpb9BMqpelu3EjkJL9CH50gzRCGqQBk Ws1rpW65q6QnPQDMPus0S33f4pmomylGWR18WwIzHpN+h5w1pXr0aVOVq w==; X-IronPort-AV: E=McAfee;i="6200,9189,10271"; a="339287820" X-IronPort-AV: E=Sophos;i="5.90,142,1643702400"; d="scan'208";a="339287820" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2022 02:10:52 -0800 X-IronPort-AV: E=Sophos;i="5.90,142,1643702400"; d="scan'208";a="708594072" Received: from jpdecker-mobl3.ger.corp.intel.com (HELO [10.213.235.138]) ([10.213.235.138]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2022 02:10:50 -0800 Message-ID: <474ded6f-4fe8-8355-9a96-2254401d10fc@linux.intel.com> Date: Mon, 28 Feb 2022 10:10:48 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Content-Language: en-US To: Sebastian Andrzej Siewior , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org References: From: Tvrtko Ursulin Organization: Intel Corporation UK Plc In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Intel-gfx] [PATCH] drm/i915: Depend on !PREEMPT_RT. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Thomas Gleixner , Rodrigo Vivi Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Hi, On 25/02/2022 23:03, Sebastian Andrzej Siewior wrote: > On 2022-02-14 19:59:08 [+0100], To intel-gfx@lists.freedesktop.org wrote: >> There are a few sections in the driver which are not compatible with >> PREEMPT_RT. They trigger warnings and can lead to deadlocks at runtime. >> >> Disable the i915 driver on a PREEMPT_RT enabled kernel. This way >> PREEMPT_RT itself can be enabled without needing to address the i915 >> issues first. The RT related patches are still in RT queue and will be >> handled later. >> >> Signed-off-by: Sebastian Andrzej Siewior > > A gentle ping ;) Could you paste a link to the queue of i915 patches pending for a quick overview of how much work there is and in what areas? Also, I assume due absence of ARCH_SUPPORTS_RT being defined by any arch, that something more is not yet ready? Regards, Tvrtko >> --- >> drivers/gpu/drm/i915/Kconfig | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig >> index a4c94dc2e2164..3aa719d5a0f0d 100644 >> --- a/drivers/gpu/drm/i915/Kconfig >> +++ b/drivers/gpu/drm/i915/Kconfig >> @@ -3,6 +3,7 @@ config DRM_I915 >> tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics" >> depends on DRM >> depends on X86 && PCI >> + depends on !PREEMPT_RT >> select INTEL_GTT >> select INTERVAL_TREE >> # we need shmfs for the swappable backing store, and in particular > > Sebastian