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?

On Tue, Aug 05, 2014 at 11:16:53AM -0600, Jim Fehlig wrote: > Jim Fehlig wrote: >> 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 # >> > > BTW, I think this would be the case for any kernel with > CONFIG_HUGETLB_PAGE turned off. Yes, we should be robust to this situation.

>> 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? >> > > E.g. assume zero/default for entries not present? If the dirs / files don't exist, we should just not report any huge page info at all. Regards, Daniel