A bit more on this. I figured out that 4.4.3 is based on Centos 8.2 and 4.4.4 is based on Centos 8.3 Looks like the newer kernel is having https://bugzilla.kernel.org/show_bug.cgi?id=207489 issue. Not sure if it's updated in the latest 4.4.5-Pre release. Regards Shantur On Wed, Feb 3, 2021 at 12:17 PM Shantur Rathore <rathore4u@gmail.com> wrote:

Hi,

I have a node 4.4.3 install and it works perfectly for PCI passthrough. After I upgraded to Node NG 4.4.4 the PCI passthrough leads to server resets. There are no logs in the kernel messages just before reset apart from vfio-pci enabling the device. So, I assume there is some change related to the kernel or vfio-pci driver in the newer 4.4.4 version.

How / Where can I see the differences between Node NG releases?

Thanks, Shantur