Re: [Xen-devel] pv_ops dom0 clock only runs under load

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Milan Holzäpfel wrote:
> Hello, 
>
> I'm trying to get a pv_ops dom0 to work on a Samsung X20 laptop
> (Pentium M processor, Intel 915/ICH6 chipset).
> The laptop hasn't got a serial port so I'm using netconsole to capture
> dmesg and a initrd-based telnetd to log in.  (Text on VGA console
> disappears as soon as Dom0 is started.)
>
> I'm using Xen 3.3.1 and 2.6.29-rc7-tip from xen.git/xen/dom0/hackery
> (commit b22698f3c4d6cbb6d38bc486da4ec61c5045895d should be included)
>
> The clock only seems to run if the system is under load (e.g. run
> "while true; do echo -n; done" in a shell).  
> With the CPU loaded and the clock running everything seems to work
> quite well (hard disk and network access, that is.)
>
> Changing the "xen" clocksource to "tsc" via sysfs didn't make a
> difference.  Enabling or disabling the "tickless" option doesn't make a
> difference either. 
>   
That's pretty mysterious; it does suggest your cpu's tsc is not ticking.

Some questions:

  1. does it work OK with 2.6.18 or other dom0 kernels?
  2. what clocksource does the kernel choose when you boot native?
  3. what does /proc/cpuinfo contain?
  4. what does /proc/interrupts contain?
  5. are there any power management options in the bios you could try
     turning on/off?

   J
> The system didn't boot up normally, I used a minimal busybox-based
> initrd as test base instead. 
>
> Here is dmesg and xm dmesg out.  .config is attached. 
>
> dmesg:
> (volumes where mounted using cryptsetup, and xend was started, see below)
>
> Output is from netconsole, so some messages might have got lost.  I
> piped the output through "sort". 
>   
Why?
> "dmesg" command output was incomplete (only about 15 K) despite a log
> buffer size of 256 K so I send the netconsole output. 
>
> [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total 
> pages: 129806
> [    0.000000] Detected 1729.018 MHz processor.
> [    0.000000] Enabling fast FPU save and restore... done.
> [    0.000000] Enabling unmasked SIMD FPU exception support... done.
> [    0.000000] Initializing CPU#0
> [    0.000000] Kernel command line: debug console=tty0 earlyprintk=vga netconsole=19000@xxxxxxxxxx/eth0,19000@xxxxxxxxx/00:18:f3:59:d7:4f 
> [    0.000000] NR_IRQS:512
> [    0.000000] PID hash table entries: 2048 (order: 11, 8192 bytes)
>   
> [    0.000000] xen: --> irq=0
> [    0.000000] xen: --> irq=1
> [    0.000000] xen: --> irq=10
> [    0.000000] xen: --> irq=11
> [    0.000000] xen: --> irq=12
> [    0.000000] xen: --> irq=13
> [    0.000000] xen: --> irq=14
> [    0.000000] xen: --> irq=15
> [    0.000000] xen: --> irq=3
> [    0.000000] xen: --> irq=4
> [    0.000000] xen: --> irq=5
> [    0.000000] xen: --> irq=6
> [    0.000000] xen: --> irq=7
> [    0.000000] xen: --> irq=8
> [    0.000000] xen: --> irq=9
> [    0.000000] xen: registering gsi 0 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 10 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 11 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 12 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 13 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 14 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 15 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 1 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 3 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 4 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 5 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 6 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 7 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 8 triggering 1 polarity 0
> [    0.000000] xen: registering gsi 9 triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 0 gsi 0 vector 240 ioapic 0 pin 0 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 10 gsi 10 vector 104 ioapic 0 pin 10 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 11 gsi 11 vector 112 ioapic 0 pin 11 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 12 gsi 12 vector 120 ioapic 0 pin 12 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 13 gsi 13 vector 136 ioapic 0 pin 13 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 14 gsi 14 vector 144 ioapic 0 pin 14 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 15 gsi 15 vector 152 ioapic 0 pin 15 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 1 gsi 1 vector 40 ioapic 0 pin 1 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 3 gsi 3 vector 48 ioapic 0 pin 3 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 4 gsi 4 vector 56 ioapic 0 pin 4 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 5 gsi 5 vector 64 ioapic 0 pin 5 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 6 gsi 6 vector 72 ioapic 0 pin 6 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 7 gsi 7 vector 80 ioapic 0 pin 7 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 8 gsi 8 vector 88 ioapic 0 pin 8 
> triggering 0 polarity 0
> [    0.000000] xen_set_ioapic_routing: irq 9 gsi 9 vector 96 ioapic 0 pin 9 
> triggering 1 polarity 0
> [    0.010000] Calibrating delay loop (skipped), value calculated using timer 
> frequency.. 3458.03 BogoMIPS (lpj=17290180)
> [    0.010000] Checking if this processor honours the WP bit even in supervisor 
> mode...Ok.
> [    0.010000] Console: colour VGA+ 80x25
> [    0.010000] console handover: boot [earlyvga0] -> real [tty0]
> [    0.010000] CPU: L1 I cache: 32K, L1 D cache: 32K
> [    0.010000] CPU: L2 cache: 2048K
> [    0.010000]       .data : 0xc038dd6b - 0xc0493cd0   (1047 kB)
> [    0.010000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
> [    0.010000]     fixmap  : 0xf5750000 - 0xf57ff000   ( 700 kB)
> [    0.010000]       .init : 0xc0499000 - 0xc04e7000   ( 312 kB)
> [    0.010000] Initializing HighMem for node 0 (00000000:00000000)
> [    0.010000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
> [    0.010000] installing Xen timer for CPU 0
> [    0.010000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
> [    0.010000] Memory: 443424k/524288k available (2615k kernel code, 79736k 
> reserved, 1047k data, 312k init, 0k highmem)
> [    0.010000] Mount-cache hash table entries: 512
> [    0.010000] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
> [    0.010000]     pkmap   : 0xf5200000 - 0xf5400000   (2048 kB)
> [    0.010000] Placing 64MB software IO TLB between c1470000 - c5470000
> [    0.010000] SMP alternatives: switching to UP code
> [    0.010000] software IO TLB at phys 0x1470000 - 0x5470000
> [    0.010000]       .text : 0xc0100000 - 0xc038dd6b   (2615 kB)
> [    0.010000] virtual kernel memory layout:
> [    0.010000]     vmalloc : 0xe0800000 - 0xf51fe000   ( 329 MB)
> [    0.010000] xen_swiotlb_fixup: buf=c1470000 size=67108864
> [    0.010000] xen_swiotlb_fixup: buf=c54d0000 size=32768
> [    0.010000] Xen: using vcpuop timer interface
> [    0.042238] Freeing SMP alternatives: 11k freed
> [    0.042285] ACPI: Core revision 20081204
> [    0.060086] cpu 0 spinlock event irq 25
> [    0.060270] Brought up 1 CPUs
> [    0.060317] CPU0 attaching NULL sched-domain.
> [    0.060882] net_namespace: 304 bytes
> [    0.060936] Booting paravirtualized kernel on Xen
> [    0.060976] Xen version: 3.3.1 (preserve-AD) (dom0)
> [    0.061110] Grant table initialized
> [    0.061200] NET: Registered protocol family 16
> [    0.061532] xenbus_probe_init ok
> [    0.061861] PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255
> [    0.061906] PCI: MCFG area at e0000000 reserved in E820
> [    0.061946] PCI: Using MMCONFIG for extended config space
> [    0.061987] PCI: Using configuration type 1 for base access
> [    0.062030] Samsung X20 Laptop detected: enabling PCI bus# renumbering 
> (pci=assign-busses)
> [    0.065889] bio: create slab <bio-0> at 0
> [    0.068976] ACPI: EC: Look up EC in DSDT
> [    0.078455] ACPI: EC: non-query interrupt received, switching to interrupt 
> mode
> [    0.079272] ACPI: Interpreter enabled
> [    0.079313] ACPI: (supports S0 S5)
> [    0.079429] ACPI: Using IOAPIC for interrupt routing
> [    0.094170] ACPI: EC: GPE = 0x17, I/O: command/status = 0x66, data = 0x62
> [    0.094212] ACPI: EC: driver started in interrupt mode
> [    0.095291] ACPI: ACPI Dock Station Driver: 1 docks/bays found
> [    0.095358] ACPI: PCI Root Bridge [PCI0] (0000:00)
> [    0.095674] pci 0000:00:02.0: reg 10 32bit mmio: [0xb0080000-0xb00fffff]
> [    0.095726] pci 0000:00:02.0: reg 14 io port: [0x1800-0x1807]
> [    0.095777] pci 0000:00:02.0: reg 18 32bit mmio: [0xc0000000-0xcfffffff]
> [    0.095830] pci 0000:00:02.0: reg 1c 32bit mmio: [0xb0000000-0xb003ffff]
> [    0.095978] pci 0000:00:02.1: reg 10 32bit mmio: [0x000000-0x07ffff]
> [    0.096343] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
> [    0.096391] pci 0000:00:1c.0: PME# disabled
> [    0.096562] pci 0000:00:1d.0: reg 20 io port: [0x1820-0x183f]
> [    0.096729] pci 0000:00:1d.1: reg 20 io port: [0x1840-0x185f]
> [    0.096896] pci 0000:00:1d.2: reg 20 io port: [0x1860-0x187f]
> [    0.097060] pci 0000:00:1d.3: reg 20 io port: [0x1880-0x189f]
> [    0.097231] pci 0000:00:1d.7: reg 10 32bit mmio: [0xb0040000-0xb00403ff]
> [    0.097398] pci 0000:00:1d.7: PME# supported from D0 D3hot D3cold
> [    0.097444] pci 0000:00:1d.7: PME# disabled
> [    0.097696] pci 0000:00:1e.2: reg 10 io port: [0x1c00-0x1cff]
> [    0.097748] pci 0000:00:1e.2: reg 14 io port: [0x18c0-0x18ff]
> [    0.097802] pci 0000:00:1e.2: reg 18 32bit mmio: [0xb0040800-0xb00409ff]
> [    0.097856] pci 0000:00:1e.2: reg 1c 32bit mmio: [0xb0040400-0xb00404ff]
> [    0.097974] pci 0000:00:1e.2: PME# supported from D0 D3hot D3cold
> [    0.098022] pci 0000:00:1e.2: PME# disabled
> [    0.098136] pci 0000:00:1e.3: reg 10 io port: [0x2400-0x24ff]
> [    0.098190] pci 0000:00:1e.3: reg 14 io port: [0x2000-0x207f]
> [    0.098329] pci 0000:00:1e.3: PME# supported from D0 D3hot D3cold
> [    0.098377] pci 0000:00:1e.3: PME# disabled
> [    0.098571] pci 0000:00:1f.0: quirk: region 1000-107f claimed by ICH6 
> ACPI/GPIO/TCO
> [    0.098621] pci 0000:00:1f.0: quirk: region 1180-11bf claimed by ICH6 GPIO
> [    0.098668] pci 0000:00:1f.0: LPC Generic IO decode 1 PIO at 0680-06ff
> [    0.098807] pci 0000:00:1f.1: reg 10 io port: [0x00-0x07]
> [    0.098915] pci 0000:00:1f.1: reg 18 io port: [0x00-0x07]
> [    0.098968] pci 0000:00:1f.1: reg 1c io port: [0x00-0x03]
> [    0.101605] pci_bus 0000:00: on NUMA node 0
> [    0.101654] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
> [    0.102216] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.RP01._PRT]
> [    0.102474] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIB._PRT]
> [    0.121374] ACPI: PCI Interrupt Link [LNKA] (IRQs *11)
> [    0.121708] ACPI: PCI Interrupt Link [LNKB] (IRQs *10)
> [    0.122037] ACPI: PCI Interrupt Link [LNKC] (IRQs *5)
> [    0.122366] ACPI: PCI Interrupt Link [LNKD] (IRQs *5)
> [    0.122697] ACPI: PCI Interrupt Link [LNKE] (IRQs *11)
> [    0.123027] ACPI: PCI Interrupt Link [LNKF] (IRQs 10) *0, disabled.
> [    0.123424] ACPI: PCI Interrupt Link [LNKG] (IRQs *5)
> [    0.123752] ACPI: PCI Interrupt Link [LNKH] (IRQs *5)
> [    0.124114] ACPI: Power Resource [CFAN] (on)
> [    0.124549] xenbus_probe_backend_init bus registered ok
> [    0.124591] xen_balloon: Initialising balloon driver.
> [    0.125144] SCSI subsystem initialized
> [    0.125257] libata version 3.00 loaded.
> [    0.125646] PCI: Using ACPI for IRQ routing
> [    0.125768] pci 0000:02:09.0: BAR 0: can't allocate resource
> [    0.126134] Xen: Initializing Xen DMA ops
> [    0.126175] Xen: Enabling DMA fallback to swiotlb
> [    0.126257] pnp: PnP ACPI init
> [    0.126306] ACPI: bus type pnp registered
> [    0.129938] xen: registering gsi 8 triggering 1 polarity 0
> [    0.132564] system 00:06: ioport range 0x1180-0x11bf has been reserved
> [    0.132608] system 00:06: ioport range 0x1640-0x164f has been reserved
> [    0.168092] pci 0000:00:1c.0: PCI bridge, secondary bus 0000:01
> [    0.168138] pci 0000:00:1c.0:   IO window: 0x3000-0x3fff
> [    0.168189] pci 0000:00:1c.0:   MEM window: 0xb4000000-0xb7ffffff
> [    0.168238] pci 0000:00:1c.0:   PREFETCH window: 
> 0x000000d0000000-0x000000d3ffffff
> [    0.168312] pci 0000:02:09.0: CardBus bridge, secondary bus 0000:03
> [    0.168353] pci 0000:02:09.0:   IO window: 0x004000-0x0040ff
> [    0.168399] pci 0000:02:09.0:   IO window: 0x004400-0x0044ff
> [    0.168447] pci 0000:02:09.0:   PREFETCH window: 0x50000000-0x53ffffff
> [    0.168494] pci 0000:02:09.0:   MEM window: 0x58000000-0x5bffffff
> [    0.168541] pci 0000:00:1e.0: PCI bridge, secondary bus 0000:02
> [    0.168584] pci 0000:00:1e.0:   IO window: 0x4000-0x4fff
> [    0.168636] pci 0000:00:1e.0:   MEM window: 0xb8000000-0xb80fffff
> [    0.168684] pci 0000:00:1e.0:   PREFETCH window: 
> 0x00000050000000-0x00000055ffffff
> [    0.168755] xen: registering gsi 17 triggering 0 polarity 1
> [    0.168803] xen: --> irq=17
> [    0.168843] xen_set_ioapic_routing: irq 17 gsi 17 vector 160 ioapic 0 pin 17 
> triggering 1 polarity 1
> [    0.168893] pci 0000:00:1c.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
> [    0.168942] pci 0000:00:1c.0: setting latency timer to 64
> [    0.169117] pci 0000:02:09.0: power state changed by ACPI to D0
> [    0.169355] pci_bus 0000:00: resource 0 io:  [0x00-0xffff]
> [    0.169396] pci_bus 0000:00: resource 1 mem: [0x000000-0xffffffffffffffff]
> [    0.169479] pci_bus 0000:01: resource 1 mem: [0xb4000000-0xb7ffffff]
> [    0.169521] pci_bus 0000:01: resource 2 mem: [0xd0000000-0xd3ffffff]
> [    0.169562] pci_bus 0000:01: resource 3 mem: [0x0-0x0]
> [    0.169602] pci_bus 0000:02: resource 0 io:  [0x4000-0x4fff]
> [    0.169643] pci_bus 0000:02: resource 1 mem: [0xb8000000-0xb80fffff]
> [    0.169684] pci_bus 0000:02: resource 2 mem: [0x50000000-0x55ffffff]
> [    0.169765] pci_bus 0000:02: resource 4 mem: [0x000000-0xffffffffffffffff]
> [    0.169807] pci_bus 0000:03: resource 0 io:  [0x4000-0x40ff]
> [    0.169847] pci_bus 0000:03: resource 1 io:  [0x4400-0x44ff]
> [    0.169888] pci_bus 0000:03: resource 2 mem: [0x50000000-0x53ffffff]
> [    0.169929] pci_bus 0000:03: resource 3 mem: [0x58000000-0x5bffffff]
> [    0.170011] NET: Registered protocol family 2
> [    0.170094] IP route cache hash table entries: 16384 (order: 4, 65536 bytes)
> [    0.170230] TCP established hash table entries: 65536 (order: 7, 524288 
> bytes)
> [    0.170657] TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
> [    0.171096] TCP: Hash tables configured (established 65536 bind 65536)
> [    0.171141] TCP reno registered
> [    0.171273] NET: Registered protocol family 1
> [    0.171390] checking if image is initramfs... it is
> [    0.178749] Freeing initrd memory: 3736k freed
> [    0.182790] Simple Boot Flag at 0x36 set to 0x1
> [    0.184236] VFS: Disk quotas dquot_6.5.2
> [    0.184303] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
> [    0.184427] Created ptmx node in devpts ino 2
> [    0.184525] msgmni has been set to 1031
> [    0.185111] alg: No test for stdrng (krng)
> [    0.185202] alg: No test for stdrng (ansi_cprng)
> [    0.185264] io scheduler noop registered
> [    0.185326] io scheduler cfq registered (default)
> [    0.185824] pcieport-driver 0000:00:1c.0: setting latency timer to 64
> [    0.194476] ACPI: Battery Slot [BAT1] (battery present)
> [    0.195128] input: Power Button (FF) as 
> /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> [    0.195559] input: Lid Switch as 
> /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input1
> [    0.196100] ACPI: Lid Switch [LID0]
> [    0.196421] input: Power Button (CM) as 
> /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input2
> [    0.196482] ACPI: Power Button (CM) [PWRB]
> [    0.196721] input: Sleep Button (CM) as 
> /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input3
> [    0.196769] ACPI: Sleep Button (CM) [SLPB]
> [    0.197840] fan PNP0C0B:00: registered as cooling_device0
> [    0.197883] ACPI: Fan [FAN1] (on)
> [    0.199050] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
> [    0.199300] processor ACPI_CPU:00: registered as cooling_device1
> [    0.199344] ACPI: Processor [CPU0] (supports 2 throttling states)
> [    0.205680] thermal LNXTHERM:01: registered as thermal_zone0
> [    0.206490] ACPI: Thermal Zone [THRM] (58 C)
> [    0.206678] Event-channel device installed.
> [    0.213147] hpet_acpi_add: no address or irqs in _CRS
> [    0.216045] brd: module loaded
> [    0.217608] xen: --> irq=22
> [    0.217651] xen_set_ioapic_routing: irq 22 gsi 22 vector 176 ioapic 0 pin 22 
> triggering 1 polarity 1
> [    0.217705] b44 0000:02:05.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
> [    0.330176] ssb: Sonics Silicon Backplane found on PCI device 0000:02:05.0
> [    0.330297] b44.c:v2.0
> [    0.370317] eth0: Broadcom 44xx/47xx 10/100BaseT Ethernet 00:00:f0:7a:09:cd
> [    0.370430] netconsole: local port 19000
> [    0.370471] netconsole: local IP 10.32.1.43
> [    0.370511] netconsole: interface eth0
> [    0.370551] netconsole: remote port 19000
> [    0.370591] netconsole: remote IP 10.32.1.1
> [    0.370632] netconsole: remote ethernet address 00:18:f3:59:d7:4f
> [    0.370674] netconsole: device eth0 not up yet, forcing it
> [    3.226382]   #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 
> - 0000001000]
> [    3.226382]  00000000 - 20000000 page 4k
> [    3.226382]     0: 0x00000010 -> 0x0000009f
> [    3.226382]     0: 0x00000100 -> 0x000008f7
> [    3.226382]     0: 0x00000978 -> 0x00020000
> [    3.226382] 0MB HIGHMEM available.
> [    3.226382]   #1 [0000978000 - 0000983000]   XEN PAGETABLES ==> [0000978000 
> - 0000983000]
> [    3.226382]   #2 [0000001000 - 0000002000]    EX TRAMPOLINE ==> [0000001000 
> - 0000002000]
> [    3.226382]   #3 [0000006000 - 0000007000]       TRAMPOLINE ==> [0000006000 
> - 0000007000]
> [    3.226382]   #4 [0000100000 - 0000550e0c]    TEXT DATA BSS ==> [0000100000 
> - 0000550e0c]
> [    3.226382]   #5 [0000551000 - 00008f7000]          RAMDISK ==> [0000551000 
> - 00008f7000]
> [    3.226382] 512MB LOWMEM available.
> [    3.226382]   #6 [0000983000 - 00009ca140]              BRK ==> [0000983000 
> - 00009ca140]
> [    3.226382]   #7 [00009cb000 - 0000a86000]          PGTABLE ==> [00009cb000 
> - 0000a86000]
> [    3.226382]   #8 [0000010000 - 0000014000]          BOOTMAP ==> [0000010000 
> - 0000014000]
> [    3.226382] (9 early reservations) ==> bootmem [0000000000 - 0020000000]
> [    3.226382] ACPI: APIC 3F69EF0A, 005A (r1 INTEL  ALVISO    6040000 LOHR      
>  5F)
> [    3.226382] ACPI: BOOT 3F69EFD8, 0028 (r1 PTLTD  $SBFTBL$  6040000  LTP      
>   1)
> [    3.226382] ACPI: DSDT 3F6996B0, 57E6 (r1 INTEL  ALVISO    6040000 INTL 
> 20030224)
> [    3.226382] ACPI: FACP 3F69EE96, 0074 (r1 INTEL  ALVISO    6040000 LOHR      
>  5F)
> [    3.226382] ACPI: FACS 3F6AFFC0, 0040
> [    3.226382] ACPI: HPET 3F69EF64, 0038 (r1 INTEL  ALVISO    6040000 LOHR      
>  5F)
> [    3.226382] ACPI: HPET id: 0x8086a201 base: 0xfed00000
> [    3.226382] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
> [    3.226382] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
> [    3.226382] ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
> [    3.226382] ACPI: IRQ0 used by override.
> [    3.226382] ACPI: IRQ2 used by override.
> [    3.226382] ACPI: IRQ9 used by override.
> [    3.226382] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> [    3.226382] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
> [    3.226382] ACPI: Local APIC address 0xfee00000
> [    3.226382] ACPI: Local APIC address 0xfee00000
> [    3.226382] ACPI: MCFG 3F69EF9C, 003C (r1 INTEL  ALVISO    6040000 LOHR      
>  5F)
> [    3.226382] ACPI: PM-Timer IO Port: 0x1008
> [    3.226382] ACPI: RSDP 000F76D0, 0014 (r0 PTLTD )
> [    3.226382] ACPI: RSDT 3F698C8C, 0048 (r1 PTLTD  Ohlone00  6040000  LTP      
>   0)
> [    3.226382] ACPI: SSDT 3F698CD4, 00C9 (r1  PmRef    CpuPm     3000 INTL 
> 20030224)
> [    3.226382] ACPI: SSDT 3F698D9D, 01BA (r1  PmRef  Cpu0Cst     3001 INTL 
> 20030224)
> [    3.226382] ACPI: SSDT 3F698F57, 031B (r1  PmRef  Cpu0Ist     3000 INTL 
> 20030224)
> [    3.226382] ACPI: SSDT 3F699482, 022E (r1 SataRe SataAhci     1000 INTL 
> 20030224)
> [    3.226382] Allocating PCI resources starting at 50000000 (gap: 
> 40000000:a0000000)
> [    3.226382]   AMD AuthenticAMD
> [    3.226382] BIOS-provided physical RAM map:
> [    3.226382]   Centaur CentaurHauls
> [    3.226382] console [earlyvga0] enabled
> [    3.226382]   Cyrix CyrixInstead
> [    3.226382]   DMA      0x00000010 -> 0x00001000
> [    3.226382]   DMA zone: 0 pages reserved
> [    3.226382]   DMA zone: 32 pages used for memmap
> [    3.226382]   DMA zone: 3822 pages, LIFO batch:0
> [    3.226382] DMI present.
> [    3.226382] early_node_map[3] active PFN ranges
> [    3.226382] Enabling APIC mode:  Flat.  Using 1 I/O APICs
> [    3.226382] FADT: X_PM1a_EVT_BLK.bit_width (16) does not match PM1_EVT_LEN 
> (4)
> [    3.226382] free_area_init_node: node 0, pgdat c0477780, node_mem_map 
> c1000200
> [    3.226382]   HighMem  0x00020000 -> 0x00020000
> [    3.226382] init_memory_mapping: 00000000-20000000
> [    3.226382]   Intel GenuineIntel
> [    3.226382] IOAPIC[0]: apic_id 255, version 32, address 0xfec00000, GSI 0-23
> [    3.226382] IOAPIC[0]: Unable to change apic_id!
> [    3.226382] kernel direct mapping tables up to 20000000 @ 9cb000-acf000
> [    3.226382] KERNEL supported cpus:
> [    3.226382] last_pfn = 0x20000 max_arch_pfn = 0x1000000
> [    3.226382] Linux version 2.6.29-rc7-tip (root@cascus) (gcc version 3.4.6 
> (Gentoo Hardened 3.4.6-r2 p1.5, ssp-3.4.6-1.0, pie-8.7.10)) #4 SMP Fri Mar 6 
> 00:33:03 CET 2009
> [    3.226382]   low ram: 0 - 20000000
> [    3.226382]   mapped low ram: 0 - 20000000
> [    3.226382] Movable zone start PFN for each node
> [    3.226382]   node 0 bootmap 00010000 - 00014000
> [    3.226382]   node 0 low ram: 00000000 - 20000000
> [    3.226382]   Normal   0x00001000 -> 0x00020000
> [    3.226382]   Normal zone: 125984 pages, LIFO batch:31
> [    3.226382]   Normal zone: 992 pages used for memmap
> [    3.226382] NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 nr_node_ids:1
> [    3.226382] nr_irqs_gsi: 24
> [    3.226382]   NSC Geode by NSC
> [    3.226382] On node 0 totalpages: 130830
> [    3.226382] PERCPU: Allocated 7 4k pages, static data 24988 bytes
> [    3.226382] Phoenix BIOS detected: BIOS may corrupt low RAM, working around 
> it.
> [    3.226382] RAMDISK: 00551000 - 008f7000
> [    3.226382] Reserving virtual address space above 0xf5800000
> [    3.226382] SMP: Allowing 1 CPUs, 0 hotplug CPUs
> [    3.226382]   Transmeta GenuineTMx86
> [    3.226382]   Transmeta TransmetaCPU
> [    3.226382]   UMC UMC UMC UMC
> [    3.226382] Using ACPI (MADT) for SMP configuration information
> [    3.226382] Using APIC driver default
> [    3.226382]  Xen: 0000000000000000 - 000000000009f800 (usable)
> [    3.226382]  Xen: 000000000009f800 - 0000000000100000 (reserved)
> [    3.226382]  Xen: 0000000000100000 - 00000000008f7000 (usable)
> [    3.226382]  Xen: 00000000008f7000 - 0000000000978000 (reserved)
> [    3.226382]  Xen: 0000000000978000 - 0000000020000000 (usable)
> [    3.226382]  Xen: 000000003f690000 - 000000003f69f000 (ACPI data)
> [    3.226382]  Xen: 000000003f69f000 - 000000003f700000 (ACPI NVS)
> [    3.226382]  Xen: 000000003f700000 - 0000000040000000 (reserved)
> [    3.226382]  Xen: 00000000e0000000 - 00000000f0006000 (reserved)
> [    3.226382]  Xen: 00000000f0008000 - 00000000f000c000 (reserved)
> [    3.226382]  Xen: 00000000fed00000 - 00000000fed00400 (reserved)
> [    3.226382]  Xen: 00000000fed20000 - 00000000fed90000 (reserved)
> [    3.226382]  Xen: 00000000ff000000 - 0000000100000000 (reserved)
> [    3.226382] Zone PFN ranges:
> [    3.766489] cpu 0 using vcpu_info at e0801020
> [    3.766489] Xen: using vcpu_info placement
> [    4.040243] b44: eth0: Link is up at 100 Mbps, full duplex.
> [    4.040286] b44: eth0: Flow control is off for TX and off for RX.
> [    4.040466] console [netcon0] enabled
> [    4.062347] netconsole: network logging started
> [    4.062602] Driver 'sd' needs updating - please use bus_type methods
> [    4.062728] Driver 'sr' needs updating - please use bus_type methods
> [    4.062927] ata_piix 0000:00:1f.1: version 2.12
> [    4.062983] xen: registering gsi 18 triggering 0 polarity 1
> [    4.063056] xen: --> irq=18
> [    4.063099] xen_set_ioapic_routing: irq 18 gsi 18 vector 184 ioapic 0 pin 18 
> triggering 1 polarity 1
> [    4.063166] ata_piix 0000:00:1f.1: PCI INT A -> GSI 18 (level, low) -> IRQ 18
> [    4.063294] ata_piix 0000:00:1f.1: setting latency timer to 64
> [    4.063480] scsi0 : ata_piix
> [    4.063759] scsi1 : ata_piix
> [    4.065394] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x1810 irq 14
> [    4.065437] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x1818 irq 15
> [    4.118089] trying to map vcpu_info 0 at e0801020, mfn 3e004, offset 32
> [    4.260863] ata1.00: ATA-6: HTS541080G9AT00, MB4OA60A, max UDMA/100
> [    4.260921] ata1.00: 155490289 sectors, multi 16: LBA48 
> [    4.261024] ata1.01: ATAPI: DV-W28EA, S.0A, max UDMA/33
> [    4.300623] ata1.00: configured for UDMA/100
> [    4.340416] ata1.01: configured for UDMA/33
> [    4.351131] scsi 0:0:0:0: Direct-Access     ATA      HTS541080G9AT00  MB4O 
> PQ: 0 ANSI: 5
> [    4.351526] sd 0:0:0:0: [sda] 155490289 512-byte hardware sectors: (79.6 
> GB/74.1 GiB)
> [    4.351613] sd 0:0:0:0: [sda] Write Protect is off
> [    4.351660] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [    4.351788] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, 
> doesn't support DPO or FUA
> [    4.351963] sd 0:0:0:0: [sda] 155490289 512-byte hardware sectors: (79.6 
> GB/74.1 GiB)
> [    4.352047] sd 0:0:0:0: [sda] Write Protect is off
> [    4.352092] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [    4.352217] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, 
> doesn't support DPO or FUA
> [    4.352269]  sda: sda1 sda2 < sda5 sda6 sda7 sda8 >
> [    4.433753] sd 0:0:0:0: [sda] Attached SCSI disk
> [    4.433999] sd 0:0:0:0: Attached scsi generic sg0 type 0
> [    4.435764] scsi 0:0:1:0: CD-ROM            TEAC     DV-W28EA         S.0A 
> PQ: 0 ANSI: 5
> [    4.470818] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda 
> tray
> [    4.470869] Uniform CD-ROM driver Revision: 3.20
> [    4.471123] sr 0:0:1:0: Attached scsi CD-ROM sr0
> [    4.471343] sr 0:0:1:0: Attached scsi generic sg1 type 5
> [    4.471469] ata2: port disabled. ignoring.
> [    4.471779] PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 
> irq 1,12
> [    4.474611] i8042.c: Detected active multiplexing controller, rev 1.1.
> [    4.476411] serio: i8042 KBD port at 0x60,0x64 irq 1
> [    4.476473] serio: i8042 AUX0 port at 0x60,0x64 irq 12
> [    4.476539] serio: i8042 AUX1 port at 0x60,0x64 irq 12
> [    4.476584] serio: i8042 AUX2 port at 0x60,0x64 irq 12
> [    4.476641] serio: i8042 AUX3 port at 0x60,0x64 irq 12
> [    4.476834] mice: PS/2 mouse device common for all mice
> [    4.477862] rtc_cmos 00:07: rtc core: registered rtc_cmos as rtc0
> [    4.477965] rtc0: alarms up to one month, y3k, 242 bytes nvram
> [    4.478245] device-mapper: ioctl: 4.14.0-ioctl (2008-04-23) initialised: 
> dm-devel@xxxxxxxxxx
> [    4.478652] cpuidle: using governor ladder
> [    4.478780] TCP cubic registered
> [    4.478824] NET: Registered protocol family 17
> [    4.478902] Using IPI No-Shortcut mode
> [    4.478945] IO APIC resources could be not be allocated.
> [    4.479467] rtc_cmos 00:07: setting system clock to 2009-03-06 00:10:09 UTC 
> (1236298209)
> [    4.479673] Freeing unused kernel memory: 312k freed
> [    4.480933] Write protecting the kernel text: 2616k
> [    4.481300] Write protecting the kernel read-only data: 800k
> [    4.500490] input: AT Translated Set 2 keyboard as 
> /devices/platform/i8042/serio0/input/input4
> [    4.523136] Marking TSC unstable due to TSC halts in idle
>
> [   59.665835] Clocksource tsc unstable (delta = -54153771637 ns)
> [   59.674669] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [   59.674669] ata1.00: cmd c8/00:80:9f:01:00/00:00:00:00:00/e0 tag 0 dma 65536 
> in
> [   59.674669]          res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 
> (timeout)
> [   59.674669] ata1.00: status: { DRDY }
> [   62.359425] ata1: soft resetting link
> [   64.151416] ata1.00: configured for UDMA/100
> [   64.789264] ata1.01: configured for UDMA/33
> [   65.223423] ata1: EH complete
> [   65.512842] sd 0:0:0:0: [sda] 155490289 512-byte hardware sectors: (79.6 
> GB/74.1 GiB)
> [   65.512842] sd 0:0:0:0: [sda] Write Protect is off
> [   65.512842] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [   65.512842] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, 
> doesn't support DPO or FUA
> [   65.535362] sd 0:0:0:0: [sda] 155490289 512-byte hardware sectors: (79.6 
> GB/74.1 GiB)
> [   65.539998] sd 0:0:0:0: [sda] Write Protect is off
> [   65.542485] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [   65.543740] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, 
> doesn't support DPO or FUA
> [   70.583796] SysRq : Changing Loglevel
> [   70.583931] Loglevel set to 9
> [   70.605760] SysRq : Changing Loglevel
> [   70.605889] Loglevel set to 9
> [  201.566346] BUG: soft lockup - CPU#0 stuck for 121s! [busybox:450]
> [  201.573542] Modules linked in:
> [  201.573542] 
> [  201.573542] Pid: 450, comm: busybox Not tainted (2.6.29-rc7-tip #4) SX20S
> [  201.573542] EIP: 0061:[<c0252266>] EFLAGS: 00000286 CPU: 0
> [  201.573542] EIP is at __copy_to_user_ll+0x6/0x70
> [  201.573542] EAX: bff3d1d8 EBX: 00000004 ECX: 00000004 EDX: df2e3e68
> [  201.573542] ESI: 00000001 EDI: df2e3e70 EBP: df2e3e2c ESP: df2e3e24
> [  201.573542]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0069
> [  201.573542] CR0: 8005003b CR2: b80a2000 CR3: 1f345000 CR4: 00000660
> [  201.573542] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [  201.573542] DR6: ffff0ff0 DR7: 00000400
> [  201.573542] Call Trace:
> [  201.573542]  [<c019d0a0>] core_sys_select+0x220/0x340
> [  201.573542]  [<c0105f6a>] ? xen_force_evtchn_callback+0x1a/0x30
> [  201.573542]  [<c0106830>] ? check_events+0x8/0xc
> [  201.573542]  [<c0106827>] ? xen_restore_fl_direct_end+0x0/0x1
> [  201.573542]  [<c038cf14>] ? _spin_unlock_irqrestore+0x14/0x20
> [  201.573542]  [<c01494af>] ? remove_wait_queue+0x3f/0x50
> [  201.573542]  [<c02a6d95>] ? n_tty_read+0x395/0x500
> [  201.573542]  [<c038cf14>] ? _spin_unlock_irqrestore+0x14/0x20
> [  201.573542]  [<c0105f6a>] ? xen_force_evtchn_callback+0x1a/0x30
> [  201.573542]  [<c0106830>] ? check_events+0x8/0xc
> [  201.573542]  [<c0105f6a>] ? xen_force_evtchn_callback+0x1a/0x30
> [  201.573542]  [<c0106830>] ? check_events+0x8/0xc
> [  201.573542]  [<c0106827>] ? xen_restore_fl_direct_end+0x0/0x1
> [  201.573542]  [<c038cf14>] ? _spin_unlock_irqrestore+0x14/0x20
> [  201.573542]  [<c01399f6>] ? current_fs_time+0x16/0x20
> [  201.573542]  [<c038cea8>] ? _spin_lock+0x8/0x10
> [  201.573542]  [<c019d23b>] sys_select+0x7b/0xa0
> [  201.573542]  [<c0108f8c>] syscall_call+0x7/0xb
> [  262.454351] hrtimer: interrupt too slow, forcing clock min delta to 45534129 
> ns
> [  268.186442] SysRq : Changing Loglevel
> [  268.186442] Loglevel set to 9
> [  269.147532] SysRq : Changing Loglevel
> [  269.147532] Loglevel set to 9
> [  270.136134] SysRq : Changing Loglevel
> [  270.136134] Loglevel set to 9
>
> Load the CPU to get the clock running and use cryptsetup to decrypt
> the hard disk. mount it:
>
> [  955.074434] ReiserFS: dm-4: found reiserfs format "3.6" with standard journal
> [  955.074434] ReiserFS: dm-4: using ordered data mode
> [  955.160289] ReiserFS: dm-4: journal params: device dm-4, size 8192, journal 
> first block 18, max trans len 1024, max batch 900, max commit age 30, max trans 
> age 30
> [  955.160568] ReiserFS: dm-4: checking transaction log (dm-4)
> [  955.610730] ReiserFS: dm-4: Using r5 hash to sort names
>
> Now start xend.
>
> [ 1506.487070] xenbus_probe wake_waiting
> [ 1506.487070] xenbus_probe wake_waiting
> [ 1506.487070] xenbus_probe_devices backend
> [ 1506.487070] xenbus_probe_devices failed xenbus_directory
> [ 1506.487070] backend_probe_and_watch devices probed ok
> [ 1506.487070] backend_probe_and_watch watch add ok ok
> [ 1506.487070] backend_probe_and_watch all done
>
>
>
> xm dmesg output:
>
>  __  __            _____  _____  _ 
>  \ \/ /___ _ __   |___ / |___ / / |
>   \  // _ \ '_ \    |_ \   |_ \ | |
>   /  \  __/ | | |  ___) | ___) || |
>  /_/\_\___|_| |_| |____(_)____(_)_|
>                                    
> (XEN) Xen version 3.3.1 (root@xxxxxxxxxxx) (gcc-Version 3.4.6 (Gentoo Hardened 3.4.6-r2 p1.5, ssp-3.4.6-1.0, pie-8.7.10)) Thu Mar  5 22:33:24 CET 2009
> (XEN) Latest ChangeSet: unavailable
> (XEN) Command line: loglvl=all guest_loglvl=all debug dom0_mem=512M console=vga
> (XEN) Video information:
> (XEN)  VGA is text mode 80x25, font 8x16
> (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 2 MBR signatures
> (XEN)  Found 2 EDD information structures
> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 000000000009f800 (usable)
> (XEN)  000000000009f800 - 00000000000a0000 (reserved)
> (XEN)  00000000000dc000 - 0000000000100000 (reserved)
> (XEN)  0000000000100000 - 000000003f690000 (usable)
> (XEN)  000000003f690000 - 000000003f69f000 (ACPI data)
> (XEN)  000000003f69f000 - 000000003f700000 (ACPI NVS)
> (XEN)  000000003f700000 - 0000000040000000 (reserved)
> (XEN)  00000000e0000000 - 00000000f0006000 (reserved)
> (XEN)  00000000f0008000 - 00000000f000c000 (reserved)
> (XEN)  00000000fed00000 - 00000000fed00400 (reserved)
> (XEN)  00000000fed20000 - 00000000fed90000 (reserved)
> (XEN)  00000000ff000000 - 0000000100000000 (reserved)
> (XEN) System RAM: 1014MB (1038524kB)
> (XEN) ACPI: RSDP 000F76D0, 0014 (r0 PTLTD )
> (XEN) ACPI: RSDT 3F698C8C, 0048 (r1 PTLTD  Ohlone00  6040000  LTP        0)
> (XEN) ACPI: FACP 3F69EE96, 0074 (r1 INTEL  ALVISO    6040000 LOHR       5F)
> (XEN) ACPI: DSDT 3F6996B0, 57E6 (r1 INTEL  ALVISO    6040000 INTL 20030224)
> (XEN) ACPI: FACS 3F6AFFC0, 0040
> (XEN) ACPI: APIC 3F69EF0A, 005A (r1 INTEL  ALVISO    6040000 LOHR       5F)
> (XEN) ACPI: HPET 3F69EF64, 0038 (r1 INTEL  ALVISO    6040000 LOHR       5F)
> (XEN) ACPI: MCFG 3F69EF9C, 003C (r1 INTEL  ALVISO    6040000 LOHR       5F)
> (XEN) ACPI: BOOT 3F69EFD8, 0028 (r1 PTLTD  $SBFTBL$  6040000  LTP        1)
> (XEN) ACPI: SSDT 3F699482, 022E (r1 SataRe SataAhci     1000 INTL 20030224)
> (XEN) ACPI: SSDT 3F698F57, 031B (r1  PmRef  Cpu0Ist     3000 INTL 20030224)
> (XEN) ACPI: SSDT 3F698D9D, 01BA (r1  PmRef  Cpu0Cst     3001 INTL 20030224)
> (XEN) ACPI: SSDT 3F698CD4, 00C9 (r1  PmRef    CpuPm     3000 INTL 20030224)
> (XEN) NUMA turned off
> (XEN) Faking a node at 0000000000000000-000000003f690000
> (XEN) Xen heap: 9MB (9780kB)
> (XEN) Domain heap initialised
> (XEN) DMI present.
> (XEN) Using APIC driver default
> (XEN) ACPI: PM-Timer IO Port: 0x1008
> (XEN) ACPI: ACPI SLEEP INFO: pm1x_cnt[1004,0], pm1x_evt[1000,0]
> (XEN) ACPI:                  wakeup_vec[3f6affcc], vec_size[20]
> (XEN) ACPI: Local APIC address 0xfee00000
> (XEN) ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> (XEN) Processor #0 6:13 APIC version 20
> (XEN) ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
> (XEN) ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
> (XEN) IOAPIC[0]: apic_id 1, version 32, 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 high level)
> (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) ACPI: HPET id: 0x8086a201 base: 0xfed00000
> (XEN) Using ACPI (MADT) for SMP configuration information
> (XEN) Using scheduler: SMP Credit Scheduler (credit)
> (XEN) Initializing CPU#0
> (XEN) Detected 1729.072 MHz processor.
> (XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
> (XEN) CPU: L2 cache: 2048K
> (XEN) Intel machine check architecture supported.
> (XEN) Intel machine check reporting enabled on CPU#0.
> (XEN) CPU0: Intel(R) Pentium(R) M processor 1.73GHz stepping 08
> (XEN) Total of 1 processors activated.
> (XEN) ENABLING IO-APIC IRQs
> (XEN)  -> Using new ACK method
> (XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
> (XEN) Platform timer is 14.318MHz HPET
> (XEN) Brought up 1 CPUs
> (XEN) I/O virtualisation disabled
> (XEN) ACPI sleep modes: S3
> (XEN) MCA: Machine check polling timer started.
> (XEN) *** LOADING DOMAIN 0 ***
> (XEN)  Xen  kernel: 32-bit, PAE, lsb
> (XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0x100000 -> 0x551000
> (XEN) PHYSICAL MEMORY ARRANGEMENT:
> (XEN)  Dom0 alloc.:   000000003d000000->000000003e000000 (126976 pages to be 
> allocated)
> (XEN) VIRTUAL MEMORY ARRANGEMENT:
> (XEN)  Loaded kernel: c0100000->c0551000
> (XEN)  Init. ramdisk: c0551000->c08f7000
> (XEN)  Phys-Mach map: c08f7000->c0977000
> (XEN)  Start info:    c0977000->c0977474
> (XEN)  Page tables:   c0978000->c0983000
> (XEN)  Boot stack:    c0983000->c0984000
> (XEN)  TOTAL:         c0000000->c0c00000
> (XEN)  ENTRY ADDRESS: c0499000
> (XEN) Dom0 has maximum 1 VCPUs
> (XEN) Scrubbing Free RAM: ....done.
> (XEN) Xen trace buffers: disabled
> (XEN) Std. Loglevel: All
> (XEN) Guest Loglevel: All
> (XEN) Xen is relinquishing VGA console.
> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
> Xen)
> (XEN) Freed 104kB init memory.
> (XEN) io_apic.c:2213: 
> (XEN) ioapic_guest_write: apic=0, pin=2, old_irq=0, new_irq=-1
> (XEN) ioapic_guest_write: old_entry=000009f0, new_entry=00010900
> (XEN) ioapic_guest_write: Attempt to remove IO-APIC pin of in-use IRQ!
> (XEN) io_apic.c:2226: 
> (XEN) ioapic_guest_write: apic=0, pin=0, old_irq=-1, new_irq=0
> (XEN) ioapic_guest_write: old_entry=00010900, new_entry=000009f0
> (XEN) ioapic_guest_write: Attempt to add IO-APIC pin for in-use IRQ!
>
>
> Any idea?  Any info from the system which might help? 
>
> Regards,
> Milan
>   
> ------------------------------------------------------------------------
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