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[Xen-bugs] [Bug 195] Many Timer ISR: Time went backwards logs

To: xen-bugs@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-bugs] [Bug 195] Many Timer ISR: Time went backwards logs
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
Date: Thu, 10 Aug 2006 04:24:08 -0700
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------- Comment #22 from ir@xxxxxxxxxxx  2006-08-10 04:24 -------
(In reply to comment #21)
> Hello
> I using XEN 3.0.2 and Kernel and I got the following message to the
> console. Then I type 'dmesg' I got the messages, too.
> The messages are show in Dom0 and DomU.
> [...]

Hi, same is true for me; i have a dual Pentium III (Coppermine). When i start
Dom0, first all semss fine:

 __  __            _____  ___   ____    ____
 \ \/ /___ _ __   |___ / / _ \ |___ \  |___ \
  \  // _ \ '_ \    |_ \| | | |  __) |__ __) |
  /  \  __/ | | |  ___) | |_| | / __/|__/ __/
 /_/\_\___|_| |_| |____(_)___(_)_____| |_____|

 University of Cambridge Computer Laboratory

 Xen version 3.0.2-2 (root@xxxxxxx) (gcc-Version 3.3.6 (Debian 1:3.3.6-13)) Mi
Aug  9 16:54:10 CEST 2006
 Latest ChangeSet: Thu Apr 13 15:18:37 2006 +0100 9617:5802713c159b

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000007fff0000 (usable)
(XEN)  000000007fff0000 - 000000007fff3000 (ACPI NVS)
(XEN)  000000007fff3000 - 0000000080000000 (ACPI data)
(XEN)  00000000fec00000 - 0000000100000000 (reserved)
(XEN) System RAM: 2047MB (2096700kB)
(XEN) Xen heap: 10MB (10560kB)
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) PAE disabled.
(XEN) found SMP MP-table at 000f56b0
(XEN) DMI 2.2 present.
(XEN) Using APIC driver default
(XEN) ACPI: RSDP (v000 VIA694                                ) @ 0x000f6ff0
(XEN) ACPI: RSDT (v001 VIA694 AWRDACPI 0x30302e32 AWRD 0x00000000) @ 0x7fff3000
(XEN) ACPI: FADT (v002 VIA694 AWRDACPI 0x30302e32 AWRD 0x00000000) @ 0x7fff3040
(XEN) ACPI: MADT (v001 VIA694 AWRDACPI 0x30302e32 AWRD 0x00000000) @ 0x7fff5880
(XEN) ACPI: DSDT (v001 VIA694 AWRDACPI 0x00001000 MSFT 0x0100000c) @ 0x00000000
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
(XEN) Processor #0 6:8 APIC version 17
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
(XEN) Processor #1 6:8 APIC version 17
(XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 dfl dfl)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) Initializing CPU#0
(XEN) Detected 997.181 MHz processor.
(XEN) CPU: L1 I cache: 16K, L1 D cache: 16K
(XEN) CPU: L2 cache: 256K
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#0.
(XEN) CPU0: Intel Pentium III (Coppermine) stepping 0a
(XEN) Booting processor 1/1 eip 90000
(XEN) Initializing CPU#1
(XEN) CPU: L1 I cache: 16K, L1 D cache: 16K
(XEN) CPU: L2 cache: 256K
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#1.
(XEN) CPU1: Intel Pentium III (Coppermine) stepping 0a
(XEN) Total of 2 processors activated.
(XEN) ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) checking TSC synchronization across 2 CPUs: passed.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 2 CPUs
(XEN) Machine check exception polling timer started.
(XEN) mtrr: your CPUs had inconsistent variable MTRR settings
(XEN) mtrr: probably your BIOS does not setup all CPUs.
(XEN) mtrr: corrected configuration.
(XEN) Using IPI Shortcut mode
(XEN) Domain 0 kernel supports features = { 0000001f }.
(XEN) Domain 0 kernel requires features = { 00000000 }.
(XEN)  Dom0 alloc.:   7c000000->7e000000 (476593 pages to be allocated)
(XEN)  Loaded kernel: c0100000->c0452254
(XEN)  Init. ramdisk: c0453000->c110c800
(XEN)  Phys-Mach map: c110d000->c12e66c4
(XEN)  Start info:    c12e7000->c12e8000
(XEN)  Page tables:   c12e8000->c12ee000
(XEN)  Boot stack:    c12ee000->c12ef000
(XEN)  TOTAL:         c0000000->c1400000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Initrd len 0xcb9800, start at 0xc0453000
(XEN) Scrubbing Free RAM: .....................done.
(XEN) Xen trace buffers: disabled
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to

i also was able to start a DomU. Some time later, these errors occure and
starting an additional DomU hangs:
Linux version (apeace@paploo) (gcc version 4.0.3 (Debian
4.0.3-1)) #1 SMP Mon May 15 17:26:36 BST 2006
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000010000000 (usable)
0MB HIGHMEM available.
264MB LOWMEM available.
ACPI in unprivileged domain disabled
IRQ lockup detection disabled
Built 1 zonelists
Kernel command line:  root=/dev/sda1 ro
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 2048 (order: 11, 32768 bytes)
Xen reported: 1243.249 MHz processor.
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Software IO TLB disabled
vmalloc area: d1000000-fb7fe000, maxmem 33ffe000
Memory: 242816k/270336k available (2231k kernel code, 19196k reserved, 694k
data, 180k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.

what is it, how may i fix that?
I tested official Kernels from the Live-CD as well as Debian Backports al well
a a selfcompiled.

Best whishes,

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