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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 8DBF7C433ED for ; Tue, 18 May 2021 09:28:46 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4CB9761353 for ; Tue, 18 May 2021 09:28:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CB9761353 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AF9546E85E; Tue, 18 May 2021 09:28:44 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1736A6E85E for ; Tue, 18 May 2021 09:28:42 +0000 (UTC) IronPort-SDR: DSh3PNdIAeooCg1AzbaFuh6QfUTYzcRw+H+2ml4lOQARR5uhJtHJWnlviHaGgTVx0umXhmo91I Qepb6S9oioEw== X-IronPort-AV: E=McAfee;i="6200,9189,9987"; a="286198891" X-IronPort-AV: E=Sophos;i="5.82,309,1613462400"; d="scan'208";a="286198891" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 02:28:42 -0700 IronPort-SDR: s4/YpV65u7qXWBbIU0VNgF7/SmPU4nIjltm3nEUBtyCU5H9hSAdzXPavgQQUxBqQq5K+xZfc0+ jGB0mWSRMF5w== X-IronPort-AV: E=Sophos;i="5.82,309,1613462400"; d="scan'208";a="472869205" Received: from lmrad-mobl.ger.corp.intel.com (HELO localhost) ([10.252.52.115]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2021 02:28:39 -0700 From: Jani Nikula To: Christoph Hellwig , Peter Zijlstra In-Reply-To: <20210512115736.GA10444@lst.de> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20210512115736.GA10444@lst.de> Date: Tue, 18 May 2021 12:28:36 +0300 Message-ID: <87eee4fl17.fsf@intel.com> MIME-Version: 1.0 Subject: Re: [Intel-gfx] 5.13 i915/PAT regression on Brasswell, adding nopat to the kernel commandline worksaround this 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: intel-gfx@lists.freedesktop.org, x86@kernel.org, Linux Kernel Mailing List , hch@lst.de Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Wed, 12 May 2021, Christoph Hellwig wrote: > On Wed, May 12, 2021 at 01:15:03PM +0200, Peter Zijlstra wrote: >> IIRC it's because of 74ffa5a3e685 ("mm: add remap_pfn_range_notrack"), >> which added a sanity check to make sure expectations were met. It turns >> out they were not. >> >> The bug is not new, the warning is. AFAIK the i915 team is aware, but >> other than that I've not followed. > > > The actual culprit is b12d691ea5e0 ("i915: fix remap_io_sg to verify the > pgprot"), but otherwise agreed. Someone the i915 maintainers all seem > to be on vacation as the previous report did not manage to trigger any > kind of reply. We are aware. I've been rattling the cages to get more attention. BR, Jani. -- Jani Nikula, Intel Open Source Graphics Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx