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Re: [Xen-users] xen 3.0 amd64 crash... seems to be tied into disk i/o,>

To: Matt Ayres <matta@xxxxxxxxxxxx>
Subject: Re: [Xen-users] xen 3.0 amd64 crash... seems to be tied into disk i/o,> 4 gig ram
From: Matt Ayres <matta@xxxxxxxxxxxx>
Date: Thu, 15 Dec 2005 14:04:39 -0500
Cc: Tom Brown <tbrown@xxxxxxxxxxxxx>, m+Ian.Pratt@xxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
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Tom Brown wrote:
On Tue, 13 Dec 2005, Matt Ayres wrote:

Tom Brown wrote:
I just posted a followup comment on bug # 405... what are you using for a

I use Tyan S881 and S882 motherboards.

My mistake, S2882.  Link: http://www.tyan.com/products/html/thunderk8sr.html

I'm not getting any hits on google for "Tyan S881" ... ahh, s4881 and
s4882 ... that 4 makes a difference :)

hhmm, looks like that will likely have the same fragmented memory layout
that the supermicro's have, as each processor has locally attached memory.

ever tried to boot one of these without a 64bit or pae kernel? Does it
only see 1/4 of the memory? what does the boot time memory map look like?
e.g. (from dmesg)

BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000bfff0000 (usable)
 BIOS-e820: 00000000bfff0000 - 00000000bffff000 (ACPI data)
 BIOS-e820: 00000000bffff000 - 00000000c0000000 (ACPI NVS)
 BIOS-e820: 00000000ff780000 - 0000000100000000 (reserved)
 BIOS-e820: 0000000100000000 - 0000000140000000 (usable)

My second memory bank starts at 0x0000000100000000, which is 2^32

I have posted another panic to bug #402. I have everything so if Ian or another developer wants more info I have the vmlinux/System.map/config available.

My board shows:
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000020000000 (usable)

Here is the physical RAM map under xm dmesg:
(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000faff0000 (usable)
(XEN)  00000000faff0000 - 00000000fafff000 (ACPI data)
(XEN)  00000000fafff000 - 00000000fb000000 (ACPI NVS)
(XEN)  00000000ff780000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000200000000 (usable)
(XEN) System RAM: 8111MB (8306236kB)
(XEN) Xen heap: 10MB (10372kB)
(XEN) PAE enabled, limit: 16 GB

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