On 28/02/16 00:04, Karanbir Singh wrote: > i had to do something similar, but my question is - one cant run xen > without the kernel, so why not have the xen package require the xen > kernel as a prereq ? You can run Xen on any Xen dom0-enabled kernel. While the stock CentOS kernel does not qualify as such there are kernels available for CentOS other than the Xen4CentOS kernel which do, such as kernel-ml from elrepo. To require the Xen4CentOS kernel would cause issues if someone wanted to use a different dom0-enabled kernel. Peter