Re: Re: [Xen-users] Re: Xen 3.1 released!

[Tomasz Chmielewski <mangoo@wpkg.org>]

Tomasz Chmielewski schrieb:

> Also, there's one more feature which doesn't work for me:
> 
>  - Preliminary save/restore/migrate support for HVM (e.g. Windows) VMs;
> 
> 
> What does "preliminary" mean here? I tried saving/restoring HVM domains, 
> but it just doesn't work.
> 
> When I try to do /etc/init.d/xendomains stop, it does something for a 
> long time, and then, my SSH session is just disconnected.
> 
> When I log in again, xend doesn't work anymore:
> 
> # xm list
> Error: Unable to connect to xend: Connection refused. Is xend running?
> 
> 
> When I start xend again, and then start xendomains, there is my domain 
> in a weird state:
> 
> # xm list
> Name                                      ID   Mem VCPUs      State Time(s)
> Domain-0                                   0   256     2     r-----    
> 134.9
> migrating-w2k3-001                         2  1759     1     ---s--     
> 64.4
> 
> 
> 
> Similar happens when I try to save the domain manually:
> 
> # xm save w2k3-001 /srv/check-2k
> 
> And Xen server restarted.
> 
> (...)
> 
> I inspected the logs, and it was the OOM-killer. Should it ever happen 
> when saving a guest domain? Xen host has 256 MB RAM for dom0 (3 GB 
> total), Xen guest 1.7 GB.

It appears that saving of HVM somains needs more memory: in this 
particular case, when I increased memory for dom0, about 350 MB RAM was 
used in total during the domain save.

After that, save/restore was fine.

So I just removed dom0_mem entry from grub; I don't think it's needed.


-- 
Tomasz Chmielewski
http://wpkg.org