Re: [XenPPC] dom0 memory size results

[Jimi Xenidis <jimix@xxxxxxxxxxxxxx>]

On Oct 19, 2006, at 9:02 AM, Jimi Xenidis wrote:

> On Oct 19, 2006, at 2:30 AM, Amos Waterland wrote:
>
> > On a JS21 with 8GB of RAM, we attempt 8 runs with the following dom0
> > memory requests: 128M 192M 256M 512M 700M 1G 2G 7G.
> Ok, we know that > 2G of dom0 is not currently supported with the  
> way we track memory today, described in:
>   http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=785
>
> > I'm surprised we need as much as 256M just to load dom0, but happy
> > that 2G works now.
> I'm surprised that any amount from 64M to 2G (currently forced in  
> 16M increments) does not allow for Dom0 to successfully make it  
> thru init.
> If fact, the maples (which only have 512M) give 192M to  dom0 by  
> default.
> These are OOM issues with the kernel?
> If you cap Linux (without Xen) to these memory limits does Linux  
> succeed?
> lets pick on 192, can you post a complete log?
*sigh* it occurs to me that now that VIO is turned on we basically  
have allocated a struct page for every page on the machine in  
addition to the normal pages that dom0 will use, this would indeed  
have an impact on how much memory Dom0 has.
-JX

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