+- set CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+
+ because if not set, it can give some dynamic memory or cpu frequencies
+ change, and vms can crash (mainly windows guest).
+
+ see http://forum.proxmox.com/threads/18238-Windows-7-x64-VMs-crashing-randomly-during-process-termination?p=93273#post93273
+