Re: [Xen-devel] [PATCH 0/2] Add hugetlb support for PV

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Jan Beulich wrote:
> > > > Dave McCracken <dcm@xxxxxxxx> 24.07.08 15:45 >>>
> > > >         
> > Here is a set of small patches that enables hugetlb on PV machines.  They are 
> > against xen-unstable and linux-2.6.18-xen.
> > The patches are specifically for x86_64.
> >
> > I originally had these patches working back in May, but recently for some 
> > reason my machine now refuses to boot the baseline xen-unstable, so I've been 
> > unable to verify them.  However, they should still work.
> > Comments, bug reports,  and suggestions are welcome.
> >     
> I must be missing something, but I can't see how you guarantee the
> super pages to be contiguous in machine memory. And even if you did,
> the hypervisor would still need to do accounting on all the 4k portions
> a super page consists of when it gets mapped/unmapped.
>   
Yeah, I'm pretty sure there has to be a lot more to it than that.

   J


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