Re: [XenPPC] Re: xen heap size

[Jimi Xenidis <jimix@xxxxxxxxxxxxxx>]

We don't consider the RMA boundary for the Xen heap at all anymore  
(not for a while)
The Xen heap is calculated based on the estimated resources we'll need.
on example is that we need to get enough HTABs for all the domain, so  
1/64th of all of memory is part of the Xen heap size.
check out powerpc/memory.c: memory_init()

On Feb 22, 2007, at 5:28 PM, Hollis Blanchard wrote:

> On Thu, 2007-02-22 at 16:07 -0600, Ryan Harper wrote:
>
> > IIRC, when dom0 boots with 192MB (the default) I usually see ~19MB of
> > heap available in the boot messages on js20.  Looking at js21, I see:
> >
> > (XEN) Xen Heap: 135MiB (138548KiB)
> >
> > RMA different size on js21?
> That's an unusual size: it's slightly more than the second 64MB RMA
> boundary, which seems to indicate there's a lot of wasted memory  
> before
> dom0 at 192MB. I wonder if this is related to the 4GB of memory in  
> this
> system. A more complete boot log might shed some light on it.
>
> To answer your question, the 970MP (in JS21) supports the same RMA  
> sizes
> as 970 and 970FX (in JS20).
>
> --
> Hollis Blanchard
> IBM Linux Technology Center
>
>
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