Hi All Back in August there was a report of these errors popping up in dmesg, and as far as I can tell it's still unresolved even in the latest kernel. System RAM resource [mem 0xc8000000-0xcfffffff] cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17 On this example its running 3.10.20-11.el6.centos.alt.x86_64 To replicate this just disable Dom0 memory ballooning in /etc/xen/xend-config.sxp and these errors will over time completely fill up dmesg. This is because the amount of memory within these two sys files is different: /sys/devices/system/xen_memory/xen_memory0/info/current_kb /sys/devices/system/xen_memory/xen_memory0/target_kb We can manually edit to work around the problem and stop the error but its not ideal, I would help with making a patch but don't really know where to start! Thanks Chris -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20140103/2e0500e4/attachment-0002.html>