linux-kernel - Re: PROBLEM: 4.15.0-rc3 APIC causes lockups on Core 2 Duo laptop

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Message-ID: <alpine.DEB.2.20.1712290906500.1899@nanos>
Date:   Fri, 29 Dec 2017 09:07:45 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Alexandru Chirvasitu <achirvasub@...il.com>
cc:     Dou Liyang <douly.fnst@...fujitsu.com>,
        Pavel Machek <pavel@....cz>,
        kernel list <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        "Maciej W. Rozycki" <macro@...ux-mips.org>,
        Mikael Pettersson <mikpelinux@...il.com>,
        Josh Poulson <jopoulso@...rosoft.com>,
        Mihai Costache <v-micos@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Marc Zyngier <marc.zyngier@....com>, linux-pci@...r.kernel.org,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Simon Xiao <sixiao@...rosoft.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Jork Loeser <Jork.Loeser@...rosoft.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        devel@...uxdriverproject.org, KY Srinivasan <kys@...rosoft.com>
Subject: Re: PROBLEM: 4.15.0-rc3 APIC causes lockups on Core 2 Duo laptop

On Thu, 28 Dec 2017, Alexandru Chirvasitu wrote:
> On Fri, Dec 29, 2017 at 12:36:37AM +0100, Thomas Gleixner wrote:
> > On Thu, 28 Dec 2017, Alexandru Chirvasitu wrote:
> > 
> > > Attached, but heads up on this: when redirecting the output of lspci
> > > -vvv to a text file as root I get
> > > 
> > > pcilib: sysfs_read_vpd: read failed: Input/output error
> > > 
> > > I can find bugs filed for various distros to this same effect, but
> > > haven't tracked down any explanations.
> > 
> > Weird, but the info looks complete.
> > 
> > Can you please add 'pci=nomsi' to the 4.15 kernel command line and see
> > whether that works?
> 
> It does (emailing from that successful boot as we speak). I'm on a
> clean 4.15-rc5 (as in no patches, etc.). 
> 
> This was also suggested way at the top of this thread by Dexuan Cui
> for 4.15-rc3 (where this exchange started), and it worked back then
> too.

I missed that part of the conversation. Let me stare into the MSI code
again.

Thanks,

	tglx