[Xen-users] oops and cr2 kernel messages

[SZABO Zsolt <szazs@xxxxxxxxx>]

Doing the daily dirvish backup at 2:00am these 2 messages have appeared on 
the console (in a screen session):
Message from syslogd@xenserver at Tue Mar  3 02:22:21 2009 ...
xenserver kernel: CR2: ffff88038a9c315c

Message from syslogd@xenserver at Tue Mar  3 02:22:21 2009 ...
xenserver kernel: Oops: 0000 [1] SMP

What can be the problem?

I have been running xen 3.2.1 since last August, but I have never seen 
such kind messages, though there have been some unexplainable freezes, and 
I regularly receive "Time went backwards" messages (I guess they are 
somehow related to the system load or I/O performance, but I cannot prove 
it).
The hardware is a TYAN VX50, 8-way Opteron w/ 4 8220 Dual Core CPUs and 
16G RAM.
Since the problem of the onboard NVidia SATA controller, I installed a PCI 
Adaptec card (aacraid module). The 4 500GB WD disks are in 
mirroring RAID1 pairs (i.e. I have ~1TB).
There is a debian-etch in PV domU and a win2003 server in HVM domU 
on LVM partitions and dom0 itself serves also a couple of LTSP clients 
(10-15) which are connecting to the linux domU (via remote X or ldm) and 
win2003 domU (via rdesktop), resp.
... and +1:  `xm dmesg` (see below) contains a lot of

(XEN) mtrr.c:216:d0 Failed to init var mtrr msr[6],total available MSR:6

messages ...

--
Zsolt

(XEN) Xen version 3.2.1 (root@xxxxxxxxx) (gcc version 4.1.2 20061115 
(prerelease) (Debian 4.1.1-21)) Tue Aug  5 18:23:52 CEST 2008
(XEN) Latest ChangeSet: unavailable
(XEN) Command line: console=vga vga=gfx-1024x768x8 apic_verbosity=debug 
cpufreq=dom0-kernel acpi=on numa=on
(XEN) Video information:
(XEN)  VGA is graphics mode 1024x768, 8 bpp
(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 4 MBR signatures
(XEN)  Found 4 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009cc00 (usable)
(XEN)  000000000009cc00 - 00000000000a0000 (reserved)
(XEN)  00000000000ce000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000007ff90000 (usable)
(XEN)  000000007ff90000 - 000000007ff97000 (ACPI data)
(XEN)  000000007ff97000 - 0000000080000000 (ACPI NVS)
(XEN)  0000000080000000 - 00000000cdf00000 (usable)
(XEN)  00000000cdf00000 - 00000000ce000000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fec00000 - 00000000fec10000 (reserved)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000fff80000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000432000000 (usable)
(XEN) System RAM: 16382MB (16775344kB)
(XEN) Xen heap: 14MB (14568kB)
(XEN) Reserving non-aligned node boundary @ mfn 1253376
(XEN) Reserving non-aligned node boundary @ mfn 2301952
(XEN) Reserving non-aligned node boundary @ mfn 3350528
(XEN) Domain heap initialised: DMA width 32 bits
(XEN) Processor #0 15:1 APIC version 16
(XEN) Processor #1 15:1 APIC version 16
(XEN) Processor #2 15:1 APIC version 16
(XEN) Processor #3 15:1 APIC version 16
(XEN) Processor #4 15:1 APIC version 16
(XEN) Processor #5 15:1 APIC version 16
(XEN) Processor #6 15:1 APIC version 16
(XEN) Processor #7 15:1 APIC version 16
(XEN) IOAPIC[0]: apic_id 8, version 17, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) mapped APIC to ffff828bfffff000 (fee00000)
(XEN) mapped IOAPIC to ffff828bffffe000 (fec00000)
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2813.004 MHz processor.
(XEN) AMD SVM: ASIDs disabled.
(XEN) HVM: SVM enabled
(XEN) CPU0: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Getting VERSION: 80050010
(XEN) Getting VERSION: 80050010
(XEN) Getting ID: 0
(XEN) Getting LVT0: 10000
(XEN) Getting LVT1: 10000
(XEN) masked ExtINT on CPU#0
(XEN) Booting processor 1/1 eip 8c000
(XEN) masked ExtINT on CPU#1
(XEN) AMD: Disabling C1 Clock Ramping Node #0
(XEN) AMD: Disabling C1 Clock Ramping Node #1
(XEN) AMD: Disabling C1 Clock Ramping Node #2
(XEN) AMD: Disabling C1 Clock Ramping Node #3
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU1: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 2/2 eip 8c000
(XEN) masked ExtINT on CPU#2
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU2: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 3/3 eip 8c000
(XEN) masked ExtINT on CPU#3
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU3: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 4/4 eip 8c000
(XEN) masked ExtINT on CPU#4
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU4: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 5/5 eip 8c000
(XEN) masked ExtINT on CPU#5
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU5: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 6/6 eip 8c000
(XEN) masked ExtINT on CPU#6
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU6: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 7/7 eip 8c000
(XEN) masked ExtINT on CPU#7
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU7: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Total of 8 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) Using local APIC timer interrupts.
(XEN) calibrating APIC timer ...
(XEN) ..... CPU clock speed is 2813.0299 MHz.
(XEN) ..... host bus clock speed is 200.9307 MHz.
(XEN) ..... bus_scale = 0x0000CDC9
(XEN) Platform timer overflows in 234 jiffies.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Brought up 8 CPUs
(XEN) AMD IOMMU: Disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, lsb, paddr 0xffffffff80200000 -> 0xffffffff805b8c8c
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000128000000->000000012c000000 (4084126 pages to be 
allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff80200000->ffffffff805b8c8c
(XEN)  Init. ramdisk: ffffffff805b9000->ffffffff814c8800
(XEN)  Phys-Mach map: ffffffff814c9000->ffffffff83411cf0
(XEN)  Start info:    ffffffff83412000->ffffffff834124a4
(XEN)  Page tables:   ffffffff83413000->ffffffff83432000
(XEN)  Boot stack:    ffffffff83432000->ffffffff83433000
(XEN)  TOTAL:         ffffffff80000000->ffffffff83800000
(XEN)  ENTRY ADDRESS: ffffffff80200000
(XEN) Dom0 has maximum 8 VCPUs
(XEN) Initrd len 0xf0f800, start at 0xffffffff805b9000
(XEN) Scrubbing Free RAM: .done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
Xen)
(XEN) Freed 100kB init memory.
(XEN) mtrr.c:216:d0 Failed to init var mtrr msr[6],total available MSR:6
[...]
(XEN) mtrr.c:216:d0 Failed to init var mtrr msr[6],total available MSR:6
(XEN) mm.c:645:d3 Non-privileged (3) attempt to map I/O space 000fee00
(XEN) traps.c:1996:d3 Domain attempted WRMSR 00000000c0000080 from 
00000000:00001d01 to 00000000:00001d00.
(XEN) mm.c:528:d3 Could not get page ref for pfn 299f0
(XEN) mm.c:752:d3 Attempt to create linear p.t. with write perms
(XEN) mm.c:1960:d3 Error while installing new compat baseptr 299f0
(XEN) mtrr.c:216:d0 Failed to init var mtrr msr[6],total available MSR:6
[...]

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