linux-kernel - Re: [PATCH v4 4/4] Use 2GB memory block size on large-memory x86-64 systems

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Message-ID: <CAE9FiQUDb=uNKV9Bj34v3vvMT04MiuoRHqTq6=KTMd+DVrMVNg@mail.gmail.com>
Date:	Mon, 24 Aug 2015 14:25:45 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Tony Luck <tony.luck@...il.com>
Cc:	Daniel J Blueman <daniel@...ascale.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Steffen Persvold <sp@...ascale.com>
Subject: Re: [PATCH v4 4/4] Use 2GB memory block size on large-memory x86-64 systems

On Mon, Aug 24, 2015 at 1:41 PM, Tony Luck <tony.luck@...il.com> wrote:
> On Mon, Aug 24, 2015 at 10:46 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>> Then, what does the E820 look like?
>
> See attached serial console log of the latest crash

Can you boot with "debug ignore_loglevel" so we can see following print out
for vmemmap?

[    0.352486]  [ffffea0000000000-ffffea0001ffffff] PMD ->
[ffff88007de00000-ffff88007fdfffff] on node 0
[    0.358758]  [ffffea0004000000-ffffea0005ffffff] PMD ->
[ffff88017d600000-ffff88017f5fffff] on node 1
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