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Date:   Tue, 13 Nov 2018 11:20:04 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Ingo Molnar <mingo@kernel.org>
Cc:     Bjorn Helgaas <helgaas@kernel.org>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Bart Van Assche <bvanassche@acm.org>,
        Jens Axboe <axboe@kernel.dk>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [GIT PULL] PCI changes for v4.20
Message-ID: <20181113102004.GC10502@zn.tnic>
References: <20181023173934.GA14918@bhelgaas-glaptop.roam.corp.google.com>
 <20181113071712.GA2353@gmail.com>
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On Tue, Nov 13, 2018 at 08:17:12AM +0100, Ingo Molnar wrote:
> 
> * Bjorn Helgaas <helgaas@kernel.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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