Hello,
I've got some Virtual Machine crash problem.Here is what I get from xm log
[2010-01-06 07:40:23 4049] INFO (XendDomain:1165) Domain jco02vm2 (4) unpaused.
[2010-01-26 11:22:48 4049] WARNING (XendDomainInfo:1258) Domain has crashed: name=jco02vm2 id=4.[2010-01-26 11:22:48 4049] DEBUG (XendDomainInfo:1914) XendDomainInfo.destroyDomain(4)
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1529) Destroying device model[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1536) Releasing devices
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vif/0[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vif/1[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/1
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2049[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2049
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2050[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2050
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2051[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2051
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2052[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2052
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2053[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2053
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2054[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2054
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2055[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2055
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing vbd/2056[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/2056
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1542) Removing console/0[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:590) XendDomainInfo.destroyDevice: deviceClass = console, device = console/0
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1534) No device model[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1536) Releasing devices
[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:106) XendDomainInfo.create_from_dict({47vcpus_params4 7: {47cap47: 0, 47weight47: 256}, 47PV_args47: 47root=/dev/sda1 ro console=hvc0 xencons=tty47, 47features47: 4747, 47cpus47: [], 47paused47: 0, 47domid47: 4, 47shutdown47: 0, 47VCPUs_live47: 1, 47PV_bootloader47: 4747, 47actions_after_crash47: 47restart47, 47vbd_refs47: [476581cdca-c9b4-81db-fd37-146a36fdce2747, 47af459dcc-ad09-2692-0c5b-193a0d42d5fd47, 471d11100f-e87c-7405-2619-74607faa095847, 4754e0642b-f3da-44a0-52f3-bf778517f2a147, 47f7371e5e-ca90-1724-fd8d-d15da590b63247, 478b864896-7daf-6014-f25a-588812cdfe6b47, 47f819f93c-df95-be15-fb9e-999953d6ab1947, 47a9a0145e-9c1a-0247-9be5-4b45b537b62347], 47PV_ramdisk47: 47/boot/initrd.img-2.6.26-2-xen-68647, 47is_control_domain47: False, 47name_label47: 47jco02vm247, 47VCPUs_at_startup47: 1, 47HVM_boot_params47: {}, 47platform47: {}, 47PV_kernel47: 47/boot/vmlinuz-2.6.26-2-xen-68647, 47console_refs47: [47be0d14fa-d2e7-8e32-9efc-061fc16015b247], 47online_vcpus47: 4, 47blocked47: 0, 47on_xend_stop47: 47ignore47, 47memory_static_min47: 0, 47HVM_boot_policy47: 4747, 47shutdown_reason47: 3, 47VCPUs_max47: 4, 47start_time47: 1262760018.0591459, 47memory_static_max47: 4294967296L, 47actions_after_shutdown47: 47destroy47, 47on_xend_start47: 47ignore47, 47crashed47: 1, 47memory_dynamic_max47: 4294967296L, 47actions_after_suspend47: 4747, 47is_a_template47: False, 47PV_bootloader_args47: 4747, 47memory_dynamic_min47: 4294967296L, 47uuid47: 47e3e139f2-abe2-d2ef-f4b5-db1f934ed02447, 47cpu_time47: 177012.080410467, 47shadow_memory47: 0, 47dying47: 1, 47vcpu_avail47: 15, 47notes47: {47HV_START_LOW47: 4118806528L, 47FEATURES47: 47writable_page_tables|writable_descriptor_tables |auto_translated_physmap|pae_pgdir_above_4gb|super visor_mode_kernel47, 47VIRT_BASE47: 3221225472L, 47GUEST_VERSION47: 472.647, 47PADDR_OFFSET47: 0, 47GUEST_OS47: 47linux47, 47HYPERCALL_PAGE47: 3222278144L, 47LOADER47: 47generic47, 47SUSPEND_CANCEL47: 1, 47PAE_MODE47: 47yes47, 47ENTRY47: 3222274048L, 47XEN_VERSION47: 47xen-3.047}, 47other_config47: {}, 47running47: 0, 47actions_after_reboot47: 47restart47, 47vif_refs47: [47fdbf7356-4cd9-adb2-d775-e999b52173ae47, 475eb681b3-afdc-a3bd-6522-5bc7e43f962847], 47vtpm_refs47: [], 47devices47: {47be0d14fa-d2e7-8e32-9efc-061fc16015b247: (47console47, {47other_config47: {}, 47protocol47: 47vt10047, 47uuid47: 47be0d14fa-d2e7-8e32-9efc-061fc16015b247, 47location47: 47247}), 478b864896-7daf-6014-f25a-588812cdfe6b47: (47vbd47, {47uuid47: 478b864896-7daf-6014-f25a-588812cdfe6b47, 47bootable47: 0, 47devid47: 2054, 47driver47: 47paravirtualised47, 47dev47: 47sda647, 47uname47: 47file:/data/vm/jco02vm2/tmp.img47, 47mode47: 47w47}), 475eb681b3-afdc-a3bd-6522-5bc7e43f962847: (47vif47, {47bridge47: 47eth147, 47mac47: 4700:16:3E:0A:01:6C47, 47devid47: 1, 47uuid47: 475eb681b3-afdc-a3bd-6522-5bc7e43f962847}), 471d11100f-e87c-7405-2619-74607faa095847: (47vbd47, {47uuid47: 471d11100f-e87c-7405-2619-74607faa095847, 47bootable47: 0, 47devid47: 2051, 47driver47: 47paravirtualised47, 47dev47: 47sda347, 47uname47: 47file:/data/vm/jco02vm2/var.img47, 47mode47: 47w47}), 47f7371e5e-ca90-1724-fd8d-d15da590b63247: (47vbd47, {47uuid47: 47f7371e5e-ca90-1724-fd8d-d15da590b63247, 47bootable47: 0, 47devid47: 2053, 47driver47: 47paravirtualised47, 47dev47: 47sda547, 47uname47: 47file:/data/vm/jco02vm2/usr.img47, 47mode47: 47w47}), 47af459dcc-ad09-2692-0c5b-193a0d42d5fd47: (47vbd47, {47uuid47: 47af459dcc-ad09-2692-0c5b-193a0d42d5fd47, 47bootable47: 0, 47devid47: 2050, 47driver47: 47paravirtualised47, 47dev47: 47sda247, 47uname47: 47file:/data/vm/jco02vm2/boot.img47, 47mode47: 47w47}), 4754e0642b-f3da-44a0-52f3-bf778517f2a147: (47vbd47, {47uuid47: 4754e0642b-f3da-44a0-52f3-bf778517f2a147, 47bootable47: 0, 47devid47: 2052, 47driver47: 47paravirtualised47, 47dev47: 47sda447, 47uname47: 47file:/data/vm/jco02vm2/var-log.img47, 47mode47: 47w47}), 476581cdca-c9b4-81db-fd37-146a36fdce2747: (47vbd47, {47uuid47: 476581cdca-c9b4-81db-fd37-146a36fdce2747, 47bootable47: 1, 47devid47: 2049, 47driver47: 47paravirtualised47, 47dev47: 47sda147, 47uname47: 47file:/data/vm/jco02vm2/slash.img47, 47mode47: 47w47}), 47fdbf7356-4cd9-adb2-d775-e999b52173ae47: (47vif47, {47bridge47: 47eth047, 47mac47: 4700:16:3E:0A:00:6C47, 47devid47: 0, 47uuid47: 47fdbf7356-4cd9-adb2-d775-e999b52173ae47}), 47f819f93c-df95-be15-fb9e-999953d6ab1947: (47vbd47, {47uuid47: 47f819f93c-df95-be15-fb9e-999953d6ab1947, 47bootable47: 0, 47devid47: 2055, 47driver47: 47paravirtualised47, 47dev47: 47sda747, 47uname47: 47file:/data/vm/jco02vm2/swap.img47, 47mode47: 47w47}), 47a9a0145e-9c1a-0247-9be5-4b45b537b62347: (47vbd47, {47uuid47: 47a9a0145e-9c1a-0247-9be5-4b45b537b62347, 47bootable47: 0, 47devid47: 2056, 47driver47: 47paravirtualised47, 47dev47: 47sda847, 47uname47: 47file:/data/vm/jco02vm2/data.img47, 47mode47: 47w47})}})
[2010-01-26 11:22:49 4049] ERROR (XendDomainInfo:111) Domain construction failedTraceback (most recent call last):
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line 109, in create_from_dict** *vm.start()
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line 444, in start** *raise XendError(47VM already running47)
XendError: VM already running[2010-01-26 11:22:49 4049] DEBUG (XendDomainInfo:1897) XendDomainInfo.destroy: domid=4
[2010-01-26 11:22:49 4049] ERROR (XendDomainInfo:1425) Failed to restart domain 4.Traceback (most recent call last):
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line 1410, in _restart** *self.info)
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line 975, in domain_create_from_dict** *dominfo = XendDomainInfo.create_from_dict(config_dict)
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line 109, in create_from_dict** *vm.start()
**File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomainInfo.py", line 444, in start** *raise XendError(47VM already running47)
XendError: VM already running

And here is my VM config file*
name * *= 'jco02vm2'
kernel *= '/boot/vmlinuz-2.6.26-2-xen-686'ramdisk = '/boot/initrd.img-2.6.26-2-xen-686'

memory *= '4096'

vcpus = "4"
root * *= '/dev/sda1 ro'

disk * *= [* 'file:/data/vm/jco02vm2/slash.img,sda1,w',
'file:/data/vm/jco02vm2/boot.img,sda2,w',*
'file:/data/vm/jco02vm2/var.img,sda3,w',*
'file:/data/vm/jco02vm2/var-log.img,sda4,w',
'file:/data/vm/jco02vm2/usr.img,sda5,w',
'file:/data/vm/jco02vm2/tmp.img,sda6,w',
'file:/data/vm/jco02vm2/swap.img,sda7,w',
'file:/data/vm/jco02vm2/data.img,sda8,w'
]

vif = [* 'bridge=eth0,mac=00:16:3E:0A:00:6C',*
'bridge=eth1,mac=00:16:3E:0A:01:6C'
]

2.6.26-2-xen-686on_reboot * = 'restart'
on_crash * *= 'restart'
extra = 'console=hvc0 xencons=tty'


My system is up to date, and I've got these crash quite often.
Do you have any idea what could be the problem?*
Thanks for your help.
--
Julien