From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751538AbbJIXoS (ORCPT ); Fri, 9 Oct 2015 19:44:18 -0400 Received: from mga03.intel.com ([134.134.136.65]:38305 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750760AbbJIXoR (ORCPT ); Fri, 9 Oct 2015 19:44:17 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,660,1437462000"; d="scan'208";a="661388677" Subject: Re: [lkp] [ACPI] 7494b07eba: Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 0 To: Al Stone , "Rafael J. Wysocki" References: <871td6xcxc.fsf@yhuang-dev.intel.com> <4975068.hExdhgQqJN@vostro.rjw.lan> <5616F69C.9080900@linaro.org> <6420944.JWV5li10OE@vostro.rjw.lan> <56184536.2020009@linaro.org> Cc: Hanjun Guo , kernel test robot , lkp@01.org, LKML From: "Rafael J. Wysocki" Organization: Intel Technology Poland Sp. z o. o., KRS 101882, ul. Slowackiego 173, 80-298 Gdansk Message-ID: <5618514C.3050806@intel.com> Date: Sat, 10 Oct 2015 01:44:12 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <56184536.2020009@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/10/2015 12:52 AM, Al Stone wrote: > On 10/09/2015 03:02 PM, Rafael J. Wysocki wrote: >> On Thursday, October 08, 2015 05:05:00 PM Al Stone wrote: >>> On 10/08/2015 04:50 PM, Rafael J. Wysocki wrote: >>>> On Thursday, October 08, 2015 02:32:15 PM Al Stone wrote: >>>>> On 10/08/2015 02:41 PM, Rafael J. Wysocki wrote: >>>>>> On Thursday, October 08, 2015 10:37:55 PM Rafael J. Wysocki wrote: >>>>>>> On Thursday, October 08, 2015 10:36:40 AM Al Stone wrote: >>>>>>>> On 10/08/2015 05:44 AM, Hanjun Guo wrote: >>>>>>>>> On 10/08/2015 11:21 AM, kernel test robot wrote: >>>>>>>>>> FYI, we noticed the below changes on >>>>>>>>>> >>>>>>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master >>>>>>>>>> commit 7494b07ebaae2117629024369365f7be7adc16c3 ("ACPI: add in a >>>>>>>>>> bad_madt_entry() function to eventually replace the macro") >>>>>>>>>> >>>>>>>>>> [ 0.000000] ACPI: undefined MADT subtable type for FADT 4.0: 127 (length 12) > [snip....] > >>> In the meantime, I'll poke the spec folks on the use of reserved subtable IDs >>> in the MADT and see what the consensus is there. It may just be a matter of >>> clarifying the language in the spec. >> One additional question to ask is what checks have been present in the OSes >> and what they do if they see a reserved MADT subtable ID. If they haven't been >> doing anything so far, I'm afraid this particular train may be gone already. > It may be gone. The silence so far is deafening :). > >>> It's also on my plate to really dig into an ACPI test suite and see about >>> building something really robust for that -- this can be added as an example. >>> I'll see if I have time to send in a patch for FWTS, too, which is pretty >>> good about capturing such things. >> Sounds good! >> >> Thanks, >> Rafael >> > Let me know if I need to send the patch to fix the regression elsewhere; it > dawned on me long after I sent it that this may not be the right place for it > to go... > Please send it to linux-acpi@vger.kernel.org. Thanks, Rafael