Re: [kvm-devel] strange problem with virtio on guest with over 3648M RAM

[Henrik H. <he...@wi...>]

Henrik Holst skrev:
> Hello KVM developers!
>
> We are experiencing a very strange problem: we have been testing 
> Ubuntu Hardy Heron Server as a guest (kvm-68 on the host) and when 
> using the virtio nic everything works fine until we give the guest 
> more than 3648 MiB of RAM.
>
> If we for example start with "-m 4096" then the ubuntu guest brings up 
> eth0 but it is impossible to get a dhcp address and if one sets a 
> static address no packets what so ever is leaving the guest.
>
> So there seam to be a problem with the virtio guest drivers when there 
> is more than 3648 MiB of ram available :), is there anyone else that 
> have experienced the same problems or are there people running virtio 
> on guest with more ram where everything is working ok?
>
> This problem could be local to ubuntu but I don't know of any other 
> distribution with virtio guest drivers out of the box.

Forgot to mention that the e1000 guest drivers works perfectly fine 
regardless of the amount of ram on the guest.

/Henrik Holst