Hi All My guest is a CentOS 5.4 VM: [root at localhost ~]# uname -a Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux [root at localhost ~]# cat /etc/*release CentOS release 5.4 (Final) I wanted to know if the virtio drivers on this guest are stable. The reason for asking this question is that i found this link: http://wiki.libvirt.org/page/Virtio which states that in order to use the virtio drivers i need to be using the kernel >=2.6.25 , but i am using the kernel version 2.6.18 in my guest VM. I am actually able to use the virtio drivers in my VM even with this kernel version and hence i wanted to know if they are stable to be used. Did red hat backport these drivers to CentOS 5.4 ? If yes , Can you please point me to any bug to track this backport activity or any announcement of this backport task ? I need that to show to my team so that we can release note this information as part of releasing our product. Appreciate your help in this regard. Thanks Jatin