Re: strange problem with virtio on guest with over 3648M RAM

[Anthony Liguori <anthony@codemonkey.ws>]

Henrik Holst wrote:
> 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?
>   

It's a know bug.  I have a fix for it locally that I'll send out today.

Regards,

Anthony Liguori

> This problem could be local to ubuntu but I don't know of any other 
> distribution with virtio guest drivers out of the box.
>
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