dom0 crash on second xen related command - problem for xen devel

[p <p@jcpob.de>]

Hi there,

this problem was posted twice on xen-users mailing list and they said we 
should forward it to the devel list ;)

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Description 1:



I have a problem "porting" my domU to another kernel.

I had used the Ubtuntu 6.10 generic kernel, for both dom0 and domU, but 
since there was no module support I compiled my own.

dom0 is up and running again, but when I try to create the domU I get an 
error (had first a special domU kernel used, but also tried the dom0 
kernel. there was no difference)

root@main:~# xm cr -c /etc/xen/root.cfg
Using config file "/etc/xen/root.cfg".
Error: (22, 'Invalid argument')

---
/var/log/xen/xend.log

['root', '/dev/hda1 ro']]], ['device', ['vbd', ['uname', 
'file:/srv/images/root66_ext3.img'], ['dev', 'hda1'], ['mode', 'w']]], 
['device', ['vbd', ['uname', 'file:/srv/images/root66_swap.img'], 
['dev', 'hda2'], ['mode', 'w']]], ['device', ['vif', ['bridge', 
'xenbr0']]]])
[2007-03-19 16:43:13 xend.XendDomainInfo 3202] DEBUG (__init__:1072) 
parseConfig: config is ['vm', ['name', 'root66'], ['memory', 384], 
['vcpus', 1], ['image', ['linux', ['kernel', '/boot/vmlinuz-2.6-xen0'], 
['root', '/dev/hda1 ro']]], ['device', ['vbd', ['uname', 
'file:/srv/images/root66_ext3.img'], ['dev', 'hda1'], ['mode', 'w']]], 
['device', ['vbd', ['uname', 'file:/srv/images/root66_swap.img'], 
['dev', 'hda2'], ['mode', 'w']]], ['device', ['vif', ['bridge', 
'xenbr0']]]]
[2007-03-19 16:43:13 xend.XendDomainInfo 3202] DEBUG (__init__:1072) 
parseConfig: result is {'shadow_memory': None, 'uuid': None, 'on_crash': 
None, 'on_reboot': None, 'localtime': None, 'image': ['linux', 
['kernel', '/boot/vmlinuz-2.6-xen0'], ['root', '/dev/hda1 ro']], 
'on_poweroff': None, 'bootloader_args': None, 'cpus': None, 'name': 
'root66', 'backend': [], 'vcpus': 1, 'cpu_weight': None, 'features': 
None, 'vcpu_avail': None, 'memory': 384, 'device': [('vbd', ['vbd', 
['uname', 'file:/srv/images/root66_ext3.img'], ['dev', 'hda1'], ['mode', 
'w']]), ('vbd', ['vbd', ['uname', 'file:/srv/images/root66_swap.img'], 
['dev', 'hda2'], ['mode', 'w']]), ('vif', ['vif', ['bridge', 
'xenbr0']])], 'bootloader': None, 'cpu': None, 'maxmem': None}
[2007-03-19 16:43:13 xend.XendDomainInfo 3202] DEBUG (__init__:1072) 
XendDomainInfo.construct: None
[2007-03-19 16:43:13 xend.XendDomainInfo 3202] ERROR (__init__:1072) 
Domain construction failed
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 
194, in create
vm.construct()
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 
1257, in construct
handle = uuid.fromString(self.info['uuid']))
Error: (22, 'Invalid argument')
[2007-03-19 16:43:13 xend.XendDomainInfo 3202] DEBUG (__init__:1072) 
XendDomainInfo.destroy: domid=None
[2007-03-19 16:43:13 xend 3202] ERROR (__init__:1072) (22, 'Invalid 
argument')
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/xen/util/xmlrpclib2.py", line 
162, in _marshaled_dispatch
response = self._dispatch(method, params)
File "SimpleXMLRPCServer.py", line 406, in _dispatch
return func(*params)
File "/usr/lib/python2.4/site-packages/xen/xend/server/XMLRPCServer.py", 
line 64, in domain_create
info = XendDomain.instance().domain_create(config)
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomain.py", line 
228, in domain_create
dominfo = XendDomainInfo.create(config)
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 
194, in create
vm.construct()
File "/usr/lib/python2.4/site-packages/xen/xend/XendDomainInfo.py", line 
1257, in construct
handle = uuid.fromString(self.info['uuid']))
Error: (22, 'Invalid argument')

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cat /etc/xen/root.cfg

kernel = "/boot/vmlinuz-2.6-xen0"
memory = 384
name = "root66"
image = "linux"
disk = [ 
'file:/srv/images/root66_ext3.img,hda1,w','file:/srv/images/root66_swap.img,hda2,w' 
]
root = "/dev/hda1 ro"
vif = [ 'bridge=xenbr0' ]

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In addition to this after executing the command (producing the error), 
the next xen related command e.g. xm list, xentop, ... causes a system 
crash.
It stops responding completly and only a hardware reset is getting it 
back to life. (But there's no entry in syslog about any failure...)

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Description 2:

Hi all,
I had installed the Xen 3.0.3 on a opensuse 10.2 (64 bits) on new 
quadcore intel processors with VT support, on a Dell Power Edge 1955 
blade. I had many machines working. This installation had a poor network 
performance when using hardware virtualization. My applications for MPI 
require low network latencies.
I try to upgrade to Xen 3,0.4 to check the network performance.
I downloaded the tarball, and I installed it.
Now my machines doesn't run. Aditionally at the secont xm related comand 
used the dom0 crashs ... causes a system crash.
Any help is wellcomed
regards, cesar

My /var/log/xen/xend.log says:

[2007-03-19 15:34:57 xend 3391] INFO (SrvDaemon:283) Xend Daemon started
[2007-03-19 15:34:57 xend 3391] INFO (SrvDaemon:287) Xend changeset: Mon 
Jan 08 14:09:25 2007 +0000 13130:4d34be661f31.
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] DEBUG 
(XendDomainInfo:212) XendDomainInfo.recreate({'paused': 0, 'cpu_time'
: 16194471880L, 'ssidref': 0, 'handle': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
0, 0, 0, 0, 0, 0], 'shutdown_reason': 0, 'dying': 0
, 'dom': 0, 'mem_kb': 512144, 'maxmem_kb': 17179869180, 'max_vcpu_id': 
7, 'crashed': 0, 'running': 1, 'shutdown': 0, 'onli
ne_vcpus': 8, 'blocked': 0})
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] INFO (XendDomainInfo:224) 
Recreating domain 0, UUID 00000000-0000-0000-0000
-000000000000.
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] WARNING 
(XendDomainInfo:246) No vm path in store for existing domain 0
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] DEBUG 
(XendDomainInfo:712) Storing VM details: {'shadow_memory': '0', 'uuid
': '00000000-0000-0000-0000-000000000000', 'on_reboot': 'restart', 
'on_poweroff': 'destroy', 'name': 'Domain-0', 'xend/res
tart_count': '0', 'vcpus': '8', 'vcpu_avail': '1', 'memory': '501', 
'on_crash': 'restart', 'maxmem': '501'}
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] DEBUG 
(XendDomainInfo:747) Storing domain details: {'cpu/1/availability': '
offline', 'cpu/3/availability': 'offline', 'name': 'Domain-0', 
'console/limit': '1048576', 'cpu/2/availability': 'offline'
, 'vm': '/vm/00000000-0000-0000-0000-000000000000', 'domid': '0', 
'cpu/7/availability': 'offline', 'cpu/0/availability': '
online', 'memory/target': '513024', 'cpu/5/availability': 'offline', 
'cpu/6/availability': 'offline', 'cpu/4/availability'
: 'offline'}
[2007-03-19 15:34:58 xend 3391] DEBUG (XendDomain:153) number of vcpus 
to use is 0
[2007-03-19 15:34:58 xend.XendDomainInfo 3391] DEBUG 
(XendDomainInfo:933) XendDomainInfo.handleShutdownWatch
xen04:/etc/init.d

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Meanwhile I found a solution for the first description, but I think it 
is a kind of work around ;)

I used the xen-hypervisor and the xen-util out of the Ubuntu 
repositories instead of compile my own.
In addition to this I didn't used the xensource source code any more, 
but instead the one (again) out of Ubuntu repos.

Using the same .config, this time there wasn't a problem at all...

Therefore I think there is another hidden problem