[Xen-users] Problem with XEN on Tyan S2882-D 2xAMD280 16GB

["Markus Binder" <Markus.Binder@xxxxxxxxxxxxxx>]

Hello!
We have a lot of strange Problems with Xen on Tyan S2882-D 
with two Dual-Core Opterons AMD280 and 16GB Corsair Memory.
(K4H510438C-ZCCC)

Symptom: Under high load, i.e. "make allyesconfig; make -j" of linux
kernel
in dom0 with allocated 16000MB of RAM crashes after a short time.
(Compiler aborts) and I have to reboot the system.

The strangest thing is: We have three of those systems,
one is working perfektly, two others not. Identical hardware.

While looking at xm dmesg i found the following on two different
systems:


============== RUNNING SYSTEM ======================

 Xen version 3.0.2 (root@) (gcc version 3.4.4 (Gentoo 3.4.4-r1,
ssp-3.4.4-1.0, pie-8.7.8)) Wed May 10 00:02:16 CEST 2006
 Latest ChangeSet: Sat Apr  8 12:14:27 2006 +0100 9598:1bce05ff1e52

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009f400 (usable)
(XEN)  000000000009f400 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000fbff0000 (usable)
(XEN)  00000000fbff0000 - 00000000fbfff000 (ACPI data)
(XEN)  00000000fbfff000 - 00000000fc000000 (ACPI NVS)
(XEN)  00000000ff780000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000400000000 (usable)
(XEN) System RAM: 16319MB (16711228kB)
(XEN) Xen heap: 9MB (10052kB)
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) PAE enabled, limit: 16 GB
(XEN) found SMP MP-table at 000ff780
(XEN) DMI 2.3 present.
(XEN) Using APIC driver default




============= BROKEN SYSTEMS ========================


 Xen version 3.0.2 (root@) (gcc version 3.4.4 (Gentoo 3.4.4-r1,
ssp-3.4.4-1.0, pie-8.7.8)) Wed May 10 00:02:16 CEST 2006
 Latest ChangeSet: Sat Apr  8 12:14:27 2006 +0100 9598:1bce05ff1e52

(XEN) WARNING: Only the first 16 GB of the physical memory map can be
accessed
(XEN)          by Xen in 32-bit mode. Truncating the memory map...
(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009f400 (usable)
(XEN)  000000000009f400 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000fbff0000 (usable)
(XEN)  00000000fbff0000 - 00000000fbfff000 (ACPI data)
(XEN)  00000000fbfff000 - 00000000fc000000 (ACPI NVS)
(XEN)  00000000ff780000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000400000000 (usable)
(XEN) System RAM: 16319MB (16711228kB)
(XEN) Xen heap: 9MB (10052kB)
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) PAE enabled, limit: 16 GB
(XEN) found SMP MP-table at 000ff780
(XEN) DMI 2.3 present.
(XEN) Using APIC driver default



=====================================================


As you can see, the broken systems show a kind of memory warning, 
although the HW and XEN Version is exactly the same on all
of our systems!

Any hints ??


Thanks,

Markus

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