Package: linux-image-2.6.32-5-686-bigmem
Version: 2.6.32-26
Severity: normal
Steps to reproduce:
1) use 64-bit squeeze as dom0
2) use 32-bit squeeze as domU
3) reboot dom0
Expected results:
3) domU's state is saved to disk and then restored
Actual results:
2) domU's state is saved to disk but it hangs after restore
More info:
1) Saving and restoring the domU with "xm save" and "xm restore"
worked at least twice. The problem occurs only if dom0 is rebooted.
=> Is some clock perhaps visible to the domU and which then gets
confused when it is reset and thus goes backwards in time?
2) hypervisor and dom0 information:
overlord2:~$ dpkg-query -W xen-hypervisor-4.0-amd64 linux-image-$(uname -r)
linux-image-2.6.32-5-xen-amd64 2.6.32-27
xen-hypervisor-4.0-amd64 4.0.1-1
overlord2:~$ sudo xm info
host : overlord2
release : 2.6.32-5-xen-amd64
version : #1 SMP Wed Oct 20 02:22:18 UTC 2010
machine : x86_64
nr_cpus : 4
nr_nodes : 1
cores_per_socket : 4
threads_per_core : 1
cpu_mhz : 2394
hw_caps :
bfebfbff:20100800:00000000:00000940:0000e3bd:00000000:00000001:00000000
virt_caps : hvm hvm_directio
total_memory : 8189
free_memory : 3
node_to_cpu : node0:0-3
node_to_memory : node0:3
node_to_dma32_mem : node0:3
max_node_id : 0
xen_major : 4
xen_minor : 0
xen_extra : .1
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
xen_commandline :
cc_compiler : gcc version 4.4.5 20100824 (prerelease) (Debian
4.4.4-11)
cc_compile_by : waldi
cc_compile_domain : debian.org
cc_compile_date : Fri Sep 3 15:38:12 UTC 2010
xend_config_format : 4
overlord2:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
stepping : 11
cpu MHz : 2394.082
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni
est ssse3 cx16 hypervisor lahf_lm
bogomips : 4788.16
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
stepping : 11
cpu MHz : 2394.082
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni
est ssse3 cx16 hypervisor lahf_lm
bogomips : 4788.16
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
stepping : 11
cpu MHz : 2394.082
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni
est ssse3 cx16 hypervisor lahf_lm
bogomips : 4788.16
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
stepping : 11
cpu MHz : 2394.082
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni
est ssse3 cx16 hypervisor lahf_lm
bogomips : 4788.16
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
3) domU information:
$ dpkg-query -W linux-image-$(uname -r)
linux-image-2.6.32-5-686-bigmem 2.6.32-26
4) We used
sudo xm dump-core squeeze32 squeeze32.dump
to save the memory of the stuck domU to disk.
5) We used
crash -s --no_panic -e emacs vmlinux-2.6.32-5-686-bigmem squeeze32.dump
to analyze the memory dump:
crash> sys
KERNEL: vmlinux-2.6.32-5-686-bigmem
DUMPFILE: D32.2
CPUS: 4
DATE: Tue Nov 2 17:44:23 2010
UPTIME: 00:11:05
LOAD AVERAGE: 0.00, 0.00, 0.00
TASKS: 79
NODENAME: squeeze32
RELEASE: 2.6.32-5-686-bigmem
VERSION: #1 SMP Tue Oct 19 15:03:03 UTC 2010
MACHINE: i686 (2394 Mhz)
MEMORY: 511.6 MB
PANIC: ""
crash> ps | grep -v IN
PID PPID CPU TASK ST %MEM VSZ RSS COMM
> 0 0 0 c13a2ba0 RU 0.0 0 0 [swapper]
> 0 0 1 df830880 RU 0.0 0 0 [swapper]
> 0 0 2 df830cc0 RU 0.0 0 0 [swapper]
> 0 0 3 df831100 RU 0.0 0 0 [swapper]
17 2 2 df8350c0 UN 0.0 0 0 [events/2]
18 2 3 df835500 UN 0.0 0 0 [events/3]
24 2 3 df836e80 UN 0.0 0 0 [xenwatch]
crash> bt 17
PID: 17 TASK: df8350c0 CPU: 2 COMMAND: "events/2"
#0 [df87be4c] schedule at c127d79f
#1 [df87bebc] schedule_timeout at c127daf4
#2 [df87befc] wait_for_common at c127d9fd
#3 [df87bf30] synchronize_sched at c10486b1
#4 [df87bf50] dev_deactivate at c11f8946
#5 [df87bf64] __linkwatch_run_queue at c11f270e
#6 [df87bf7c] linkwatch_event at c11f2760
#7 [df87bf80] worker_thread at c10473c3
#8 [df87bfc0] kthread at c1049eca
#9 [df87bfe4] kernel_thread_helper at c1008d25
crash> bt 18
PID: 18 TASK: df835500 CPU: 3 COMMAND: "events/3"
#0 [df87dec4] schedule at c127d79f
#1 [df87df34] __mutex_lock_common at c127df3a
#2 [df87df68] __mutex_lock_slowpath at c127df9c
#3 [df87df70] mutex_lock at c127e02d
#4 [df87df7c] linkwatch_event at c11f274d
#5 [df87df80] worker_thread at c10473c3
#6 [df87dfc0] kthread at c1049eca
#7 [df87dfe4] kernel_thread_helper at c1008d25
crash> bt 24
PID: 24 TASK: df836e80 CPU: 3 COMMAND: "xenwatch"
#0 [df8b3e88] schedule at c127d79f
#1 [df8b3ef8] __mutex_lock_common at c127df3a
#2 [df8b3f2c] __mutex_lock_slowpath at c127df9c
#3 [df8b3f34] mutex_lock at c127e02d
#4 [df8b3f40] netif_notify_peers at c11f8c71
#5 [df8b3f48] backend_changed at e0822f15
#6 [df8b3f9c] xenwatch_thread at c1196dd6
#7 [df8b3fc0] kthread at c1049eca
#8 [df8b3fe4] kernel_thread_helper at c1008d25
crash>
=> pids 24 and 18 are waiting for a mutex, probably rtnlmutex
=> pid 17 has acquired the rtnlmutex.
=> What is supposed wake pid 17 up?
6) We took another memory dump just to obvserve that the value of jiffies is
not changing:
crash> print jiffies
$8 = 91395
crash> quit
$ crash -s --no_panic -e emacs vmlinux-2.6.32-5-686-bigmem squeeze32.2.dump
crash> print jiffies
$8 = 91395
However, "xm list -l" shows that the cpu usage time is slowly increasing.
7) after about 3 hours of waiting the domU magically recovered:
Nov 2 14:17:32 squeeze32 kernel: imklog 4.6.4, log source = /proc/kmsg started.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Reserving virtual address
space above 0xf5800000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Initializing cgroup subsys
cpuset
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Initializing cgroup subsys cpu
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Linux version
2.6.32-5-686-bigmem (Debian 2.6.32-26) (da...@debian.org) (gcc version 4.3.5
(Debian 4.3.5-4) ) #1 SMP Tue Oct 19 15:03:03 UTC 2010
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] KERNEL supported cpus:
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Intel GenuineIntel
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] AMD AuthenticAMD
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] NSC Geode by NSC
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Cyrix CyrixInstead
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Centaur CentaurHauls
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Transmeta GenuineTMx86
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Transmeta TransmetaCPU
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] UMC UMC UMC UMC
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] ACPI in unprivileged domain
disabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] BIOS-provided physical RAM map:
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen: 0000000000000000 -
00000000000a0000 (usable)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen: 00000000000a0000 -
0000000000100000 (reserved)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen: 0000000000100000 -
0000000020000000 (usable)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] DMI not present or invalid.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] last_pfn = 0x20000
max_arch_pfn = 0x1000000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] initial memory mapped : 0 -
033ff000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] init_memory_mapping:
0000000000000000-0000000020000000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] NX (Execute Disable)
protection: active
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] 0000000000 - 0020000000 page
4k
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] kernel direct mapping tables
up to 20000000 @ 100000-205000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] RAMDISK: 01620000 - 029f5000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] 0MB HIGHMEM available.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] 512MB LOWMEM available.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] mapped low ram: 0 - 20000000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] low ram: 0 - 20000000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] node 0 low ram: 00000000 -
20000000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] node 0 bootmap 00002000 -
00006000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] (9 early reservations) ==>
bootmem [0000000000 - 0020000000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #0 [0000000000 - 0000001000]
BIOS data page ==> [0000000000 - 0000001000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #1 [0002a78000 - 0002a90000]
XEN PAGETABLES ==> [0002a78000 - 0002a90000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #2 [0000001000 - 0000002000]
EX TRAMPOLINE ==> [0000001000 - 0000002000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #3 [0000006000 - 0000007000]
TRAMPOLINE ==> [0000006000 - 0000007000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #4 [0001000000 - 00014fa3f4]
TEXT DATA BSS ==> [0001000000 - 00014fa3f4]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #5 [0001620000 - 00029f5000]
RAMDISK ==> [0001620000 - 00029f5000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #6 [00029f5000 - 0002a78000]
XEN START INFO ==> [00029f5000 - 0002a78000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #7 [0000100000 - 00001e9000]
PGTABLE ==> [0000100000 - 00001e9000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] #8 [0000002000 - 0000006000]
BOOTMAP ==> [0000002000 - 0000006000]
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Zone PFN ranges:
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] DMA 0x00000000 ->
0x00001000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Normal 0x00001000 ->
0x00020000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] HighMem 0x00020000 ->
0x00020000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Movable zone start PFN for
each node
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] early_node_map[2] active PFN
ranges
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] 0: 0x00000000 -> 0x000000a0
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] 0: 0x00000100 -> 0x00020000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] On node 0 totalpages: 130976
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] free_area_init_node: node 0,
pgdat c13cff40, node_mem_map c2a90000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] DMA zone: 32 pages used for
memmap
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] DMA zone: 0 pages reserved
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] DMA zone: 3968 pages, LIFO
batch:0
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Normal zone: 992 pages used
for memmap
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Normal zone: 125984 pages,
LIFO batch:31
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Using APIC driver default
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] SFI: Simple Firmware Interface
v0.7 http://simplefirmware.org
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] SMP: Allowing 4 CPUs, 0
hotplug CPUs
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Local APIC disabled by BIOS --
you can enable it with "lapic"
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] APIC: disable apic facility
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] nr_irqs_gsi: 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] PM: Registered nosave memory:
00000000000a0000 - 0000000000100000
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Allocating PCI resources
starting at 20000000 (gap: 20000000:e0000000)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Booting paravirtualized kernel
on Xen
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen version: 4.0.1
(preserve-AD)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] NR_CPUS:32 nr_cpumask_bits:32
nr_cpu_ids:4 nr_node_ids:1
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] PERCPU: Embedded 15 pages/cpu
@c2e94000 s37656 r0 d23784 u65536
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] pcpu-alloc: s37656 r0 d23784
u65536 alloc=16*4096
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2
[0] 3
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] trying to map vcpu_info 0 at
c2e95010, mfn 20d098, offset 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] cpu 0 using vcpu_info at
c2e95010
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] trying to map vcpu_info 1 at
c2ea5010, mfn 20d088, offset 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] cpu 1 using vcpu_info at
c2ea5010
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] trying to map vcpu_info 2 at
c2eb5010, mfn 20d078, offset 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] cpu 2 using vcpu_info at
c2eb5010
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] trying to map vcpu_info 3 at
c2ec5010, mfn 20d068, offset 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] cpu 3 using vcpu_info at
c2ec5010
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen: using vcpu_info placement
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Built 1 zonelists in Zone
order, mobility grouping on. Total pages: 129952
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Kernel command line:
root=/dev/xvda ro console=hvc0
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] PID hash table entries: 2048
(order: 1, 8192 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Dentry cache hash table
entries: 65536 (order: 6, 262144 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Inode-cache hash table
entries: 32768 (order: 5, 131072 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Enabling fast FPU save and
restore... done.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Enabling unmasked SIMD FPU
exception support... done.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Initializing CPU#0
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Initializing HighMem for node
0 (00000000:00000000)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Memory: 491968k/524288k
available (2569k kernel code, 31748k reserved, 1374k data, 388k init, 0k
highmem)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] virtual kernel memory layout:
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] fixmap : 0xf5556000 -
0xf57ff000 (2724 kB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] pkmap : 0xf5000000 -
0xf5200000 (2048 kB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] vmalloc : 0xe0800000 -
0xf4ffe000 ( 327 MB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] lowmem : 0xc0000000 -
0xe0000000 ( 512 MB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] .init : 0xc13da000 -
0xc143b000 ( 388 kB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] .data : 0xc128244d -
0xc13d9cf0 (1374 kB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] .text : 0xc1000000 -
0xc128244d (2569 kB)
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] SLUB: Genslabs=13, HWalign=64,
Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Hierarchical RCU
implementation.
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] NR_IRQS:1280
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Console: colour dummy device
80x25
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] console [tty0] enabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] console [hvc0] enabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Xen: using vcpuop timer
interface
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] installing Xen timer for CPU 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.000000] Detected 2394.036 MHz
processor.
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Calibrating delay loop
(skipped), value calculated using timer frequency.. 4788.07 BogoMIPS
(lpj=9576144)
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Security Framework initialized
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] SELinux: Disabled at boot.
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Mount-cache hash table
entries: 512
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing cgroup subsys ns
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing cgroup subsys
cpuacct
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing cgroup subsys
devices
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing cgroup subsys
freezer
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing cgroup subsys
net_cls
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L1 I cache: 32K, L1 D
cache: 32K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L2 cache: 4096K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Physical Processor ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Processor Core ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Performance Events:
unsupported p6 CPU model 15 no PMU driver, software events only.
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] SMP alternatives: switching to
UP code
Nov 2 14:17:32 squeeze32 kernel: [ 0.004399] installing Xen timer for CPU 1
Nov 2 14:17:32 squeeze32 kernel: [ 0.004431] SMP alternatives: switching to
SMP code
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing CPU#1
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L1 I cache: 32K, L1 D
cache: 32K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L2 cache: 4096K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Physical Processor ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Processor Core ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.008952] installing Xen timer for CPU 2
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing CPU#2
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L1 I cache: 32K, L1 D
cache: 32K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L2 cache: 4096K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Physical Processor ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Processor Core ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.009241] installing Xen timer for CPU 3
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] Initializing CPU#3
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L1 I cache: 32K, L1 D
cache: 32K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: L2 cache: 4096K
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Physical Processor ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.004000] CPU: Processor Core ID: 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.009393] Brought up 4 CPUs
Nov 2 14:17:32 squeeze32 kernel: [ 0.009447] CPU0 attaching sched-domain:
Nov 2 14:17:32 squeeze32 kernel: [ 0.009454] domain 0: span 0-3 level CPU
Nov 2 14:17:32 squeeze32 kernel: [ 0.009463] groups: 0 1 2 3
Nov 2 14:17:32 squeeze32 kernel: [ 0.009487] CPU1 attaching sched-domain:
Nov 2 14:17:32 squeeze32 kernel: [ 0.009493] domain 0: span 0-3 level CPU
Nov 2 14:17:32 squeeze32 kernel: [ 0.009501] groups: 1 2 3 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.009524] CPU2 attaching sched-domain:
Nov 2 14:17:32 squeeze32 kernel: [ 0.009530] domain 0: span 0-3 level CPU
Nov 2 14:17:32 squeeze32 kernel: [ 0.009538] groups: 2 3 0 1
Nov 2 14:17:32 squeeze32 kernel: [ 0.009561] CPU3 attaching sched-domain:
Nov 2 14:17:32 squeeze32 kernel: [ 0.009566] domain 0: span 0-3 level CPU
Nov 2 14:17:32 squeeze32 kernel: [ 0.009575] groups: 3 0 1 2
Nov 2 14:17:32 squeeze32 kernel: [ 0.009738] devtmpfs: initialized
Nov 2 14:17:32 squeeze32 kernel: [ 0.009738] Grant table initialized
Nov 2 14:17:32 squeeze32 kernel: [ 0.009738] regulator: core version 0.5
Nov 2 14:17:32 squeeze32 kernel: [ 0.009738] NET: Registered protocol
family 16
Nov 2 14:17:32 squeeze32 kernel: [ 0.012050] PCI: Fatal: No config space
access function found
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] bio: create slab <bio-0> at 0
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] ACPI: Interpreter disabled.
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] xen_balloon: Initialising
balloon driver.
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] vgaarb: loaded
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] PCI: System does not support
PCI
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] PCI: System does not support
PCI
Nov 2 14:17:32 squeeze32 kernel: [ 0.012875] Switching to clocksource xen
Nov 2 14:17:32 squeeze32 kernel: [ 0.019527] pnp: PnP ACPI: disabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.019540] PnPBIOS: Disabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.020189] NET: Registered protocol
family 2
Nov 2 14:17:32 squeeze32 kernel: [ 0.020303] IP route cache hash table
entries: 4096 (order: 2, 16384 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.119927] TCP established hash table
entries: 16384 (order: 5, 131072 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.120005] TCP bind hash table entries:
16384 (order: 5, 131072 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.120072] TCP: Hash tables configured
(established 16384 bind 16384)
Nov 2 14:17:32 squeeze32 kernel: [ 0.120086] TCP reno registered
Nov 2 14:17:32 squeeze32 kernel: [ 0.120204] NET: Registered protocol
family 1
Nov 2 14:17:32 squeeze32 kernel: [ 0.120318] Unpacking initramfs...
Nov 2 14:17:32 squeeze32 kernel: [ 0.153610] Freeing initrd memory: 20308k
freed
Nov 2 14:17:32 squeeze32 kernel: [ 0.162590] platform rtc_cmos: registered
platform RTC device (no PNP device found)
Nov 2 14:17:32 squeeze32 kernel: [ 0.163047] audit: initializing netlink
socket (disabled)
Nov 2 14:17:32 squeeze32 kernel: [ 0.163071] type=2000
audit(1288700248.679:1): initialized
Nov 2 14:17:32 squeeze32 kernel: [ 0.166293] HugeTLB registered 2 MB page
size, pre-allocated 0 pages
Nov 2 14:17:32 squeeze32 kernel: [ 0.168396] VFS: Disk quotas dquot_6.5.2
Nov 2 14:17:32 squeeze32 kernel: [ 0.168462] Dquot-cache hash table
entries: 1024 (order 0, 4096 bytes)
Nov 2 14:17:32 squeeze32 kernel: [ 0.168598] msgmni has been set to 1000
Nov 2 14:17:32 squeeze32 kernel: [ 0.169229] alg: No test for stdrng (krng)
Nov 2 14:17:32 squeeze32 kernel: [ 0.169311] Block layer SCSI generic (bsg)
driver version 0.4 loaded (major 253)
Nov 2 14:17:32 squeeze32 kernel: [ 0.169323] io scheduler noop registered
Nov 2 14:17:32 squeeze32 kernel: [ 0.169330] io scheduler anticipatory
registered
Nov 2 14:17:32 squeeze32 kernel: [ 0.169338] io scheduler deadline
registered
Nov 2 14:17:32 squeeze32 kernel: [ 0.169389] io scheduler cfq registered
(default)
Nov 2 14:17:32 squeeze32 kernel: [ 0.169586] isapnp: Write Data Register
0xa79 already used
Nov 2 14:17:32 squeeze32 kernel: [ 0.173466] Linux agpgart interface v0.103
Nov 2 14:17:32 squeeze32 kernel: [ 0.173710] Serial: 8250/16550 driver, 4
ports, IRQ sharing enabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.174084] PNP: No PS/2 controller found.
Probing ports directly.
Nov 2 14:17:32 squeeze32 kernel: [ 0.174919] i8042.c: No controller found.
Nov 2 14:17:32 squeeze32 kernel: [ 0.174994] mice: PS/2 mouse device common
for all mice
Nov 2 14:17:32 squeeze32 kernel: [ 0.175058] rtc_cmos: probe of rtc_cmos
failed with error -16
Nov 2 14:17:32 squeeze32 kernel: [ 0.175096] cpuidle: using governor ladder
Nov 2 14:17:32 squeeze32 kernel: [ 0.175103] cpuidle: using governor menu
Nov 2 14:17:32 squeeze32 kernel: [ 0.175113] No iBFT detected.
Nov 2 14:17:32 squeeze32 kernel: [ 0.175391] TCP cubic registered
Nov 2 14:17:32 squeeze32 kernel: [ 0.175574] NET: Registered protocol
family 10
Nov 2 14:17:32 squeeze32 kernel: [ 0.175973] lo: Disabled Privacy Extensions
Nov 2 14:17:32 squeeze32 kernel: [ 0.176215] Mobile IPv6
Nov 2 14:17:32 squeeze32 kernel: [ 0.176223] NET: Registered protocol
family 17
Nov 2 14:17:32 squeeze32 kernel: [ 0.176242] Using IPI No-Shortcut mode
Nov 2 14:17:32 squeeze32 kernel: [ 0.176326] PM: Resume from disk failed.
Nov 2 14:17:32 squeeze32 kernel: [ 0.176342] registered taskstats version 1
Nov 2 14:17:32 squeeze32 kernel: [ 0.176376] XENBUS: Device with no driver:
device/vbd/51712
Nov 2 14:17:32 squeeze32 kernel: [ 0.176383] XENBUS: Device with no driver:
device/vif/0
Nov 2 14:17:32 squeeze32 kernel: [ 0.176391] XENBUS: Device with no driver:
device/console/0
Nov 2 14:17:32 squeeze32 kernel: [ 0.176412]
/tmp/buildd/linux-2.6-2.6.32/debian/build/source_i386_none/drivers/rtc/hctosys.c:
unable to open rtc device (rtc0)
Nov 2 14:17:32 squeeze32 kernel: [ 0.176445] Initalizing network drop
monitor service
Nov 2 14:17:32 squeeze32 kernel: [ 0.176491] Freeing unused kernel memory:
388k freed
Nov 2 14:17:32 squeeze32 kernel: [ 0.177527] Write protecting the kernel
text: 2572k
Nov 2 14:17:32 squeeze32 kernel: [ 0.177839] Write protecting the kernel
read-only data: 924k
Nov 2 14:17:32 squeeze32 kernel: [ 0.218177] udev[77]: starting version 163
Nov 2 14:17:32 squeeze32 kernel: [ 0.240302] Initialising Xen virtual
ethernet driver.
Nov 2 14:17:32 squeeze32 kernel: [ 0.248886] blkfront: xvda: barriers
enabled
Nov 2 14:17:32 squeeze32 kernel: [ 0.249192] xvda: unknown partition table
Nov 2 14:17:32 squeeze32 kernel: [ 0.431926] kjournald starting. Commit
interval 5 seconds
Nov 2 14:17:32 squeeze32 kernel: [ 0.431944] EXT3-fs: mounted filesystem
with ordered data mode.
Nov 2 14:17:32 squeeze32 kernel: [ 1.355631] udev[158]: starting version 163
Nov 2 14:17:32 squeeze32 kernel: [ 1.707941] input: PC Speaker as
/devices/platform/pcspkr/input/input0
Nov 2 14:17:32 squeeze32 kernel: [ 1.849344] Error: Driver 'pcspkr' is
already registered, aborting...
Nov 2 14:17:32 squeeze32 kernel: [ 2.153273] EXT3 FS on xvda, internal
journal
Nov 2 14:17:32 squeeze32 kernel: [ 2.250745] loop: module loaded
Nov 2 14:17:42 squeeze32 kernel: [ 13.692056] eth0: no IPv6 routers present
Nov 2 14:18:58 squeeze32 kernel: [ 89.571723] suspending xenstore...
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] trying to map vcpu_info 0 at
c2e95010, mfn 13188a, offset 16
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] cpu 0 using vcpu_info at
c2e95010
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] trying to map vcpu_info 1 at
c2ea5010, mfn 13187a, offset 16
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] cpu 1 using vcpu_info at
c2ea5010
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] trying to map vcpu_info 2 at
c2eb5010, mfn 13186a, offset 16
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] cpu 2 using vcpu_info at
c2eb5010
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] trying to map vcpu_info 3 at
c2ec5010, mfn 13185a, offset 16
Nov 2 14:19:39 squeeze32 kernel: [ 89.576142] cpu 3 using vcpu_info at
c2ec5010
Nov 2 14:21:21 squeeze32 kernel: [ 191.777200] suspending xenstore...
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] trying to map vcpu_info 0 at
c2e95010, mfn 13188a, offset 16
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] cpu 0 using vcpu_info at
c2e95010
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] trying to map vcpu_info 1 at
c2ea5010, mfn 13187a, offset 16
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] cpu 1 using vcpu_info at
c2ea5010
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] trying to map vcpu_info 2 at
c2eb5010, mfn 13186a, offset 16
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] cpu 2 using vcpu_info at
c2eb5010
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] trying to map vcpu_info 3 at
c2ec5010, mfn 13185a, offset 16
Nov 2 14:26:33 squeeze32 kernel: [ 191.784007] cpu 3 using vcpu_info at
c2ec5010
Nov 2 14:34:27 squeeze32 kernel: [ 665.577176] suspending xenstore...
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] trying to map vcpu_info 0 at
c2e95010, mfn 131889, offset 16
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] cpu 0 using vcpu_info at
c2e95010
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] trying to map vcpu_info 1 at
c2ea5010, mfn 131879, offset 16
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] cpu 1 using vcpu_info at
c2ea5010
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] trying to map vcpu_info 2 at
c2eb5010, mfn 131869, offset 16
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] cpu 2 using vcpu_info at
c2eb5010
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] trying to map vcpu_info 3 at
c2ec5010, mfn 131859, offset 16
Nov 2 17:44:23 squeeze32 kernel: [ 665.579316] cpu 3 using vcpu_info at
c2ec5010
Nov 2 17:44:23 squeeze32 kernel: [ 665.597226] SysRq : HELP : loglevel(0-9)
reBoot Crash terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I)
thaw-filesystems(J) saK show-backtrace-all-active-cpus(L) show-memory-usage(M)
nice-all-RT-tasks(N) powerOff show-registers(P) show-all-timers(Q) unRaw Sync
show-task-states(T) Unmount show-blocked-tasks(W) dump-ftrace-buffer(Z)
=> This 3 hours and 10 minutes seems to correspond to the uptime that
dom0 had before its reboot:
overlord2:~$ last reboot
reboot system boot 2.6.32-5-xen-amd Tue Nov 2 14:36 - 09:34 (18:58)
reboot system boot 2.6.32-5-xen-amd Tue Nov 2 11:26 - 14:34 (03:07)
reboot system boot 2.6.32-5-xen-amd Tue Nov 2 09:37 - 11:24 (01:46)
reboot system boot 2.6.32-5-xen-amd Tue Nov 2 09:34 - 09:36 (00:02)
reboot system boot 2.6.32-5-amd64 Mon Nov 1 16:44 - 09:32 (16:47)
reboot system boot 2.6.32-5-amd64 Mon Nov 1 16:39 - 16:43 (00:03)
reboot system boot 2.6.32-5-amd64 Mon Nov 1 16:25 - 16:29 (00:04)
reboot system boot 2.6.32-5-amd64 Mon Nov 1 15:47 - 16:29 (00:42)
reboot system boot 2.6.32-5-amd64 Mon Nov 1 15:27 - 15:44 (00:17)
=> Theory: some counter is reset when dom0 is rebooted. domU becomes
very upset when the counter suddenly jumps backwards and recovers only
when the counter has finally reached its previous value?
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