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no syscall flag in CPU info

Hi all,

we are facing a problem with a new installed compute node. after the installation, whan trying to lunch a new VM on the compute node, we get the following error:

2015-06-08 17:44:48.177 11462 TRACE nova.compute.manager [instance: 0180cd94-3b41-49a9-85d4-00d50aefabb4]   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 896, in createWithFlags
2015-06-08 17:44:48.177 11462 TRACE nova.compute.manager [instance: 0180cd94-3b41-49a9-85d4-00d50aefabb4]     if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
2015-06-08 17:44:48.177 11462 TRACE nova.compute.manager [instance: 0180cd94-3b41-49a9-85d4-00d50aefabb4] libvirtError: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: syscall
2015-06-08 17:44:48.177 11462 TRACE nova.compute.manager [instance: 0180cd94-3b41-49a9-85d4-00d50aefabb4]

As you can see, our host CPU does not provide a required feature: "syscall".

looking at the CPU info: (only one core info is attached), we can see that the syscall flag does not shown in the flags list. (we have another host withe the same CPU, that has the syscall flag listed.) is there an option to enable the syscall flag in the CPU? or do you have any other solution?

Thanks in advance,

Alon.

root@ubuntuServer5:~# cat /proc/cpuinfo
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 42
model name    : Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz
stepping    : 7
microcode    : 0x18
cpu MHz        : 1600.000
cache size    : 6144 KB
physical id    : 0
siblings    : 4
core id        : 0
cpu cores    : 4
apicid        : 0
initial apicid    : 0
fdiv_bug    : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 13
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
bogomips    : 6185.99
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management: