linux-kernel - Re: [GIT PULL] PCI changes for v4.20

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Date:   Tue, 13 Nov 2018 11:20:04 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bart Van Assche <bvanassche@....org>,
        Jens Axboe <axboe@...nel.dk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [GIT PULL] PCI changes for v4.20

On Tue, Nov 13, 2018 at 08:17:12AM +0100, Ingo Molnar wrote:
> 
> * Bjorn Helgaas <helgaas@...nel.org> wrote:
> 
> > PCI changes:
> > 
> >   - Pay attention to device-specific _PXM node values (Jonathan Cameron)
> 
> There's a new boot regression, my AMD ThreadRipper system (MSI X399 SLI 
> PLUS (MS-7B09)) hangs during early bootup, and I have bisected it down to 
> this commit:
> 
>   bad7dcd94f39: ACPI/PCI: Pay attention to device-specific _PXM node values
> 
> Reverting it solves the hang.
> 
> Unfortunately there's no console output when it hangs, even with 
> earlyprintk. It just hangs after the "loading initrd" line.
> 
> Config is an Ubuntu-ish config with PROVE_LOCKING=y and a few other debug 
> options.
> 
> All my other testsystems boot fine with similar configs, so it's probably 
> something specific to this system.

Lemme add Tom, he might have an idea.

-- 
Regards/Gruss,
    Boris.

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