[libvirt] qemu driver fails to load on Xen after be0782e1

[Jim Fehlig]

Until recently, the qemu driver has always succeeded in loading even on
a system booted to Xen.  Commit be0782e1 broke this, hence libvirtd no
longer loads

xendom0 # /usr/sbin/libvirtd -l
2014-08-04 22:27:31.586+0000: 35859: info : libvirt version: 1.2.8
2014-08-04 22:27:31.586+0000: 35859: error :
virFileGetDefaultHugepageSize:2958 : internal error: Unable to parse
/proc/meminfo
2014-08-04 22:27:31.586+0000: 35859: error : virStateInitialize:749 :
Initialization of QEMU state driver failed: internal error: Unable to
parse /proc/meminfo
2014-08-04 22:27:31.586+0000: 35859: error : daemonRunStateInit:922 :
Driver state initialization failed

Problem is the Xen kernel does not provide any huge page info in
/proc/meminfo

xendom0 # cat /proc/meminfo | grep -i huge
xendom0 #

Michal, short of always building with '--without-qemu' on a Xen system,
is it possible to make detection of huge pages less fatal wrt loading
the qemu driver?

Regards,
Jim