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

[Tomasz Chmielewski <mangoo@wpkg.org>]

Keir Fraser schrieb:
> 
> 
> On 25/5/07 13:57, "Tomasz Chmielewski" <mangoo@wpkg.org> wrote:
> 
>>>>> 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.
>>> That's kind of surprising, but I guess totally plausible if you don't
>>> configure a swap partition for dom0?
>> No - dom0 has a 2 GB swap partition.
> 
> Hmmm... That's not so explicable. Obviously something in save/restore is
> causing unpageable allocations to happen. Could be pagetables for mappings
> of HVM guest memory, or something like that. Needs investigating further, I
> think.

Could be.

Now that I repeated the save/restore a couple of times, total RAM usage 
for dom0 jumps to ~700 MB sometimes during domain save (dom0 has now 
about 2.3 GB RAM, domU has 1.7 GB RAM; 4 GB RAM installed now in the 
machine).


-- 
Tomasz Chmielewski
http://wpkg.org