From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joseph Salisbury Subject: Re: Subject: [v3.19 Regression] x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI Date: Wed, 15 Jul 2015 12:05:57 -0400 Message-ID: <55A684E5.8050109@canonical.com> References: <55A4132B.4030801@canonical.com> <55A47716.9070605@linux.intel.com> <55A54540.9050300@canonical.com> <55A5D0CC.6020100@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from youngberry.canonical.com ([91.189.89.112]:49323 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751828AbbGOQGH (ORCPT ); Wed, 15 Jul 2015 12:06:07 -0400 In-Reply-To: <55A5D0CC.6020100@linux.intel.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Jiang Liu Cc: konrad.wilk@oracle.com, tony.luck@intel.com, joro@8bytes.org, Greg KH , Benjamin Herrenschmidt , "Rafael J. Wysocki" , Bjorn Helgaas , rdunlap@infradead.org, Yinghai Lu , bp@alien8.de, len.brown@intel.com, pavel@ucw.cz, Thomas Gleixner , LKML , mingo@redhat.com, hpa@zytor.com, x86@kernel.org, linux-pm@vger.kernel.org On 07/14/2015 11:17 PM, Jiang Liu wrote: > On 2015/7/15 1:22, Joseph Salisbury wrote: >> On 07/13/2015 10:42 PM, Jiang Liu wrote: >>> On 2015/7/14 3:36, Joseph Salisbury wrote: >>>> Hello Jiang, >>>> >>>> A kernel bug report was opened against Ubuntu [0]. It was found that >>>> reverting the following commit resolves this bug: >>>> >>>> commit cd68f6bd53cf89d1d5ed889b8af65e9c3574a079 >>>> Author: Jiang Liu >>>> Date: Mon Oct 27 16:11:52 2014 +0800 >>>> >>>> x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI >>>> >>>> The regression was introduced as of v3.19-rc1. >>>> >>>> I was hoping to get your feedback, since you are the patch author. Do >>>> you think gathering any additional data will help diagnose this issue, >>>> or would it be best to submit a revert request? >>> Hi Joseph, >>> Sorry for the trouble. It would be great if we could get >>> more information about the bug, such as bug report info, dmesg and >>> acpidump from the reporting system. >>> Thanks! >>> Gerry >> Comments 3 and 4 have the requested information in the bugzilla bug: >> https://bugzilla.kernel.org/show_bug.cgi?id=101301 >> >> Thanks again for the help! > Hi Joseph, > According to my investigation, it's an ACPI BIOS issue instead > of a kernel bug. But it's actually a regression. Now we enforce stricter > check for ACPI SCI interrupt, which exposes an implementation flaw in > the virtual BIOS. > > I have posted the analysis at > https://bugzilla.kernel.org/show_bug.cgi?id=101301 > But I have no account at launchpad, so could you please help to copy > the message to launchpad? > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440072 > > Thanks! > Gerry Thanks for the analysis and feedback, Gerry. I'll update the launchpad bug with your info. Thanks, Joe