From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753143AbdLWNdH (ORCPT <rfc822;w@1wt.eu>);
        Sat, 23 Dec 2017 08:33:07 -0500
Received: from Galois.linutronix.de ([146.0.238.70]:58692 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1750928AbdLWNdF (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Sat, 23 Dec 2017 08:33:05 -0500
Date: Sat, 23 Dec 2017 14:32:52 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Dexuan Cui <decui@microsoft.com>
cc: Alexandru Chirvasitu <achirvasub@gmail.com>,
        Dou Liyang <douly.fnst@cn.fujitsu.com>, Pavel Machek <pavel@ucw.cz>,
        kernel list <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        "Maciej W. Rozycki" <macro@linux-mips.org>,
        Mikael Pettersson <mikpelinux@gmail.com>,
        Josh Poulson <jopoulso@microsoft.com>,
        "Mihai Costache (Cloudbase Solutions SRL)" <v-micos@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Simon Xiao <sixiao@microsoft.com>,
        Saeed Mahameed <saeedm@mellanox.com>,
        Jork Loeser <Jork.Loeser@microsoft.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        KY Srinivasan <kys@microsoft.com>
Subject: RE: PROBLEM: 4.15.0-rc3 APIC causes lockups on Core 2 Duo laptop
In-Reply-To: <KL1P15301MB00064E9E767F9395744F42A3BF030@KL1P15301MB0006.APCP153.PROD.OUTLOOK.COM>
Message-ID: <alpine.DEB.2.20.1712231432210.1853@nanos>
References: <20171218101131.GA5338@amd> <20171219083421.GB24638@arch-chirva.localdomain> <alpine.DEB.2.20.1712200124440.2282@nanos> <ec3a298b-27a3-f3fe-ea8d-a777669104ba@cn.fujitsu.com> <20171220131929.GC24638@arch-chirva.localdomain>
 <20171220194506.GD24638@arch-chirva.localdomain> <20171221022356.GE24638@arch-chirva.localdomain> <1bd74ca3-afca-9d61-6911-61250f459891@cn.fujitsu.com> <20171222142053.3cbhi2nhh24w7yoo@D-69-91-141-110.dhcp4.washington.edu>
 <KL1P15301MB000676F3F8C9A5AC8C489E75BF020@KL1P15301MB0006.APCP153.PROD.OUTLOOK.COM> <20171222222917.GA1138@arch-chirva.localdomain> <KL1P15301MB00064E9E767F9395744F42A3BF030@KL1P15301MB0006.APCP153.PROD.OUTLOOK.COM>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
X-Linutronix-Spam-Score: -1.0
X-Linutronix-Spam-Level: -
X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required,  ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Sat, 23 Dec 2017, Dexuan Cui wrote:

> > From: Alexandru Chirvasitu [mailto:achirvasub@gmail.com]
> > Sent: Friday, December 22, 2017 14:29
> > 
> > The output of that precise command run just now on a freshly-compiled
> > copy of that commit is attached.
> > 
> > On Fri, Dec 22, 2017 at 09:31:28PM +0000, Dexuan Cui wrote:
> > > > From: Alexandru Chirvasitu [mailto:achirvasub@gmail.com]
> > > > Sent: Friday, December 22, 2017 06:21
> > > >
> > > > In the absence of logs, the best I can do at the moment is attach a
> > > > picture of the screen I am presented with on the apic=debug boot
> > > > attempt.
> > > > Alex
> > >
> > > The panic happens in irq_matrix_assign_system+0x4e/0xd0 in your picture.
> > > IMO we should find which line of code causes the panic. I suppose
> > > "objdump -D kernel/irq/matrix.o" can help to do that.
> > >
> > > Thanks,
> > > -- Dexuan
> 
> The BUG_ON panic happens at line 147:
>                    BUG_ON(!test_and_clear_bit(bit, cm->alloc_map));
> 
> I'm sure Thomas and Dou know it better than me. 

I'll have a look after the holidays.

Thanks,

	tglx