Re: Never mind Re: [Xen-devel] Re: Xen reboots when trying to start new domain

[Kip Macy <kmacy@xxxxxxxxxxxxxxx>]

>
> Note that we don't support direct writing to pde's (yet), only to leaf
> entries in the multi-level page table.

Ahh - then it wouldn't help with this particular problem. I'm getting
an error when I unpin a page as an L2 table and then immediately re-pin
it as an L1.


                                -Kip


>
>  -- Keir
>
> > I'm hitting a bug in the pmap code when switching to multi-user mode. It
> > looks to me like a bug in Xen, but I don't know for sure yet. I'd like
> > to try turning on writable pagetables and use the stock i386 pmap.c code
> > to see how much mileage I get out of that. Is there any documentation on
> > the writable pagetable interfaces other than wading through the
> > changesets?
> >
> >
> > Thanks.
> >
> >                             -Kip
> >
> >
> >
> > On Fri, 10 Sep 2004, Keir Fraser wrote:
> >
> > > > I just burned an extra page so I'm not aliasing the page table - so now
> > > > it comes up.
> > > >
> > > >
> > > >                                         -Kip
> > > >
> > >
> > > Excellent! I'd encourage you to continue to avoid the aliasing, as it
> > > may lead to performance degradation in the future. Once you're up can
> > > you kill the low mappings and free the extra page?
> > >
> > >  -- Keir
> > >
> > >
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>
>


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