[Xen-devel] RE: Xen/ia64 - global or per VP VHPT

To:	"Yang, Fred" <fred.yang@xxxxxxxxx>, "Dong, Eddie" <eddie.dong@xxxxxxxxx>
Subject:	[Xen-devel] RE: Xen/ia64 - global or per VP VHPT
From:	"Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Date:	Fri, 29 Apr 2005 08:44:19 -0700
Cc:	Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, ipf-xen <ipf-xen@xxxxxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
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Thread-topic:	Xen/ia64 - global or per VP VHPT

> > Per-domain VHPT will have its disadvantages too, namely a large
> > chunk of memory per domain that is not owned by the domain.
> > Perhaps this is not as much of a problem on VT which will be
> > limited to 16 domains, but I hope to support more non-VT domains
> > (at least 64, maybe more).
> For the quick answer on this, we are using fixed partition on 
> RID to get 16 domains for start - to get to domainN.  But it 
> is for the basic code to work.  The scheme can be switched to 
> dynamically RID partition to get to >64 domains.

But only with a full TLB purge on every domain switch, correct?

Dan

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