From: "Lendacky, Thomas" <Thomas.Lendacky@amd.com>
To: Borislav Petkov <bp@alien8.de>, 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-pci@vger.kernel.org>,
"linux-kernel@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>
Subject: Re: [GIT PULL] PCI changes for v4.20
Date: Tue, 13 Nov 2018 14:41:33 +0000 [thread overview]
Message-ID: <c963b647-6428-c89b-37ab-9b9587e56de0@amd.com> (raw)
In-Reply-To: <20181113102004.GC10502@zn.tnic>
On 11/13/2018 04:20 AM, Borislav Petkov wrote:
> 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.
I'm not seeing any issues on my EPYC system. Let me see if I can locate a
Threadripper system to test on.
It seems very strange that the commit in question would cause a hang so
early. Do you have a serial console hooked up for the earlyprintk? Is the
serial port set up in legacy mode (e.g. 0x3f8 as opposed to being an MMIO
device that would require a driver)?
Can you dump the ACPI tables / run them through iasl to see what the _PXM
values are in the DSDT table?
Thanks,
Tom
>
next prev parent reply other threads:[~2018-11-13 14:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 17:39 [GIT PULL] PCI changes for v4.20 Bjorn Helgaas
2018-10-25 13:55 ` Linus Torvalds
2018-11-13 7:17 ` Ingo Molnar
2018-11-13 10:20 ` Borislav Petkov
2018-11-13 14:41 ` Lendacky, Thomas [this message]
2018-11-13 19:47 ` Lendacky, Thomas
2018-11-13 14:47 ` Bjorn Helgaas
2018-11-14 10:21 ` Ingo Molnar
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