Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to 4KB regardless of system page size"

From: Christoph Hellwig
Date: Tue Mar 15 2016 - 08:22:14 EST

On Tue, Mar 15, 2016 at 12:40:06PM +0200, Or Gerlitz wrote:
> "[..] Regarding backward compatibility in SR-IOV, if hypervisor has
> this new code, the virtual OS must be updated. [...]"

Which is broken, we can't break user or guest VM ABIs ever.