| 
This sounds very similar to bugs we've seen with Xen version before 3.1
We believe the problem to be disk I/O related, but in our  
environment, disk I/O is also network I/O, so it's hard to tell. 
We believe this problem to be corrected in 3.1, but we still haven't  
done enough testing to satisfy ourselves entirely on this. 
See this previous thread:
http://lists.xensource.com/archives/html/xen-users/2007-03/msg00073.html
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-- Engine Yard, Ruby on Rails Hosting
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On Jun 26, 2007, at 12:46 AM, Xin Chen wrote:
 
Hi All,
I am not sure about this, just wondering anyone has the similar  
situation with me:: 
I was using  scp command on a remote server, copying a 20G file  
into Domain 0 server. 
the speed displayed is around 8Mb/s
waiting...
waiting...
at 67%, it stopped, why? because Domain 0 reboot.....
I check the log, nothing useful. I guess it is because the network  
flowing,
because the domain 0 has been running for 3 weeks until today I do  
the copying. 
I attached some info, please give me some advice, thanks a lot!!
xin
[root@XenServer xen]# uname -a
Linux XenServer 2.6.18-1.2798.fc6xen #1 SMP Mon Oct 16 15:11:19 EDT  
2006 i686 i686 i386 GNU/Linux 
[root@XenServer xen]# xm info
host                   : XenServer
release                : 2.6.18-1.2798.fc6xen
version                : #1 SMP Mon Oct 16 15:11:19 EDT 2006
machine                : i686
nr_cpus                : 4
nr_nodes               : 1
sockets_per_node       : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 1600
hw_caps                : bfebfbff: 
20100000:00000000:00000140:0004e33d:00000000:00000001 
total_memory           : 4094
free_memory            : 0
xen_major              : 3
xen_minor              : 0
xen_extra              : .3-rc3-1.2798.f
xen_caps               : xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0- 
x86_32p 
xen_pagesize           : 4096
platform_params        : virt_start=0xf5800000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)
cc_compile_by          : brewbuilder
cc_compile_domain      : build.redhat.com
cc_compile_date        : Mon Oct 16 14:34:31 EDT 2006
xend_config_format     : 2
/var/log/xend.log
[2007-06-24 01:08:55 xend 3125] DEBUG (DevController:149) Waiting  
for 51712.
[2007-06-24 01:08:55 xend 3125] DEBUG (DevController:472)  
hotplugStatusCallback 
/local/domain/0/backend/tap/6/51712/hotplug-status.
[2007-06-24 01:08:55 xend 3125] DEBUG (DevController:486)  
hotplugStatusCallback 
1.
[2007-06-24 01:08:55 xend 3125] DEBUG (DevController:143) Waiting  
for devices vt 
pm.
[2007-06-24 01:08:55 xend 3125] INFO (XendDomain:370) Domain stimpy  
(6) unpaused 
.
[2007-06-26 17:18:55 xend 3154] INFO (SrvDaemon:283) Xend Daemon  
started  -> here is the place reboot.
[2007-06-26 17:18:55 xend 3154] INFO (SrvDaemon:287) Xend  
changeset: unavailable 
 .
[2007-06-26 17:18:55 xend.XendDomainInfo 3154] DEBUG  
(XendDomainInfo:212) XendDo
mainInfo.recreate({'paused': 0, 'cpu_time': 29578464995L,  
'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': 4012156, 'maxmem_kb': -4, 'max_vcpu_id':  
3, 'crashed': 
 0, 'running': 1, 'shutdown': 0, 'online_vcpus': 4, 'blocked': 0})
[2007-06-26 17:18:55 xend.XendDomainInfo 3154] INFO (XendDomainInfo: 
224) Recreat 
ing domain 0, UUID 00000000-0000-0000-0000-000000000000.
[2007-06-26 17:18:55 xend.XendDomainInfo 3154] WARNING  
(XendDomainInfo:246) No v 
m path in store for existing domain 0
[2007-06-26 17:18:55 xend.XendDomainInfo 3154] DEBUG  
(XendDomainInfo:715) Storin
g VM details: {'shadow_memory': '0', 'uuid':  
'00000000-0000-0000-0000-0000000000
00', 'on_reboot': 'restart', 'on_poweroff': 'destroy', 'name':  
'Domain-0', 'xend
/restart_count': '0', 'vcpus': '4', 'vcpu_avail': '15', 'memory':  
'3919', 'on_cr 
ash': 'restart', 'maxmem': '3919'}
[2007-06-26 17:18:56 xend.XendDomainInfo 3154] DEBUG  
(XendDomainInfo:750) Storin
g domain details: {'cpu/1/availability': 'online', 'cpu/3/ 
availability': 'online
', 'name': 'Domain-0', 'console/limit': '1048576', 'cpu/2/ 
availability': 'online
', 'vm': '/vm/00000000-0000-0000-0000-000000000000', 'domid': '0',  
'cpu/0/availa 
bility': 'online', 'memory/target': '4013056'}
[2007-06-26 17:18:56 xend 3154] DEBUG (XendDomain:153) number of  
vcpus to use is 
 0
[2007-06-26 17:18:56 xend 3154] INFO (SrvServer:116) unix path=/var/ 
lib/xend/xen 
d-socket
/var/log/message:
Jun 26 17:14:58 XenServer kernel: peth1: received packet with  own  
address as so 
urce address
Jun 26 17:15:57 XenServer last message repeated 2 times
Jun 26 17:15:57 XenServer kernel: peth0: received packet with  own  
address as so 
urce address
Jun 26 17:16:01 XenServer kernel: peth1: received packet with  own  
address as so 
urce address
Jun 26 17:17:00 XenServer kernel: peth1: received packet with  own  
address as so 
urce address
Jun 26 17:18:38 XenServer syslogd 1.4.1: restart. --> here is the  
place reboot
Jun 26 17:18:38 XenServer kernel: klogd 1.4.1, log source = /proc/ 
kmsg started.
Jun 26 17:18:38 XenServer kernel: Linux version  
2.6.18-1.2798.fc6xen (brewbuilde
r@xxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.1 20061011 (Red Hat  
4.1.1-30)) # 
1 SMP Mon Oct 16 15:11:19 EDT 2006
Jun 26 17:18:38 XenServer kernel: BIOS-provided physical RAM map:
Jun 26 17:18:38 XenServer kernel:  Xen: 0000000000000000 -  
00000000f575f000 (usa 
ble)
Jun 26 17:18:38 XenServer kernel: 3199MB HIGHMEM available.
Jun 26 17:18:38 XenServer kernel: 727MB LOWMEM available.
Jun 26 17:18:38 XenServer kernel: NX (Execute Disable) protection:  
active 
Jun 26 17:18:38 XenServer kernel: found SMP MP-table at 000f5f20
Jun 26 17:18:38 XenServer kernel: DMI present.
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC (acpi_id[0x00]  
lapic_id[0x00] enab 
led)
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC (acpi_id[0x01]  
lapic_id[0x01] enab 
led)
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC (acpi_id[0x02]  
lapic_id[0x02] enab 
led)
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC (acpi_id[0x03]  
lapic_id[0x03] enab 
led)
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC_NMI (acpi_id[0x00]  
high edge lint[ 
0x1])
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC_NMI (acpi_id[0x01]  
high edge lint[ 
0x1])
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC_NMI (acpi_id[0x02]  
high edge lint[ 
0x1])
Jun 26 17:18:38 XenServer kernel: ACPI: LAPIC_NMI (acpi_id[0x03]  
high edge lint[ 
0x1])
Jun 26 17:18:38 XenServer kernel: ACPI: IOAPIC (id[0x04] address 
[0xfec00000] gsi 
_base[0])
Jun 26 17:18:38 XenServer kernel: IOAPIC[0]: apic_id 4, version 32,  
address 0xfe 
c00000, GSI 0-23
Jun 26 17:18:38 XenServer kernel: ACPI: IOAPIC (id[0x05] address 
[0xfec80000] gsi 
_base[24])
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