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

[Tomasz Chmielewski <mangoo@wpkg.org>]

Keir Fraser schrieb:
> On 25/5/07 14:20, "Tomasz Chmielewski" <mangoo@wpkg.org> wrote:
> 
>>> 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).
> 
> The only thing I would expect could so dramatically inflate dom0's memory
> usage would be caching of disc blocks from the saved image file. But we
> added explicit cache flushing to both domain-save and domain-restore before
> releasing 3.1. The flushes are only advisory though, so perhaps they are
> getting ignored for some reason.

For your notice, I just saw 1.3 GB RAM usage when doing a 1.7 GB HVM 
domain save :)


-- 
Tomasz Chmielewski
http://wpkg.org