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Re: [Xen-devel] Re: Xen reboots when trying to start new domain

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: Xen reboots when trying to start new domain
From: Kip Macy <kmacy@xxxxxxxxxxxxxxx>
Date: Thu, 9 Sep 2004 16:52:59 -0700 (PDT)
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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Not surprisingly FreeBSD expects those low temporary double mappings to
be there. How do you recommend fixing this without throwing more
pagetables at it that pmap_init will have to garbage collect?

                                -Kip





>
> We now support direct update of PTEs by guests. To allow this we have
> to record which entry in a page directory the page table is mapped
> at. This means we can no longer support having the same page table
> mapped at differnt PDE indexes.
>
>  -- Keir
>
> >
> >
> > > That isn't allowed any more. :-)
> >
> > Ahh - yes I think it does. I wonder how FreeBSD will fair without that
> > mapping. Does the aliasing make ref-counting too hard?
> >
> >
> >
> >
> >
> >
> > >
> > >  -- Keir
> > >
> > >
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