Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console

[Carsten Otte]

Arnd Bergmann wrote:
> Can't you just leave it out for this release? Early printk is great
> for debugging, but not essential if you just want to run a guest
> as long as you get it past the virtio init phase.
The upstream kernel assumes to have this hypercall available when 
running on kvm. You won't get past the virtio init phase if you leave it 
out for kernels <= 2.6.32.