Re: [XenPPC] Re: [Xen-ia64-devel] [PATCH 1/2] remove xencomm page size limit(xen side)

[Hollis Blanchard <hollisb@xxxxxxxxxx>]

On Thu, 2007-08-02 at 11:44 +0900, Isaku Yamahata wrote:
> 
> > But we can issue sequential p2m hcalls with different offsets, so we
> do.
> > So what exactly is the new problem?
> 
> The limit is about 64GB for xen/ia64 because xen/ia64 deafult page
> size
> is 16KB.
> The issue I'm seeing is the populate physmap hypercall failure
> at domain creation. It's essentially same issue you described above.
> I want to remove the limitation with the patches. 

Can't you simply issue repeated populate_physmap hypercalls,
incrementing extent_start?

Or, since you in fact probably don't need access to all 100GB during
domain creation, can't you just map the area you need?

> > (As a side question, is it really so difficult for you guys to just use
> > the common code? I tried very hard to make it easy for you to just
> > implement a couple hooks; I can't imagine it would take more than a day
> > to do it.)
> 
> Sorry for that. It seems to be good time to resolve it.
> I'll work on xencomm consolidation.

No need to apologize, I'm just surprised that with all your xencomm work
it hasn't already been done.

-- 
Hollis Blanchard
IBM Linux Technology Center


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