On Thu, 2008-04-10 at 10:32 -0400, Michael Abd-El-Malek wrote:
> On Apr 10, 2008, at 10:11 AM, Mark McLoughlin wrote:
> > On Thu, 2008-04-10 at 09:01 -0500, Jeremy Fitzhardinge wrote:
> >> Michael Abd-El-Malek wrote:
> >>> Is 64-bit domU support available anywhere at the moment? For
> >>> example,
> >>> what is the status of the git://git.et.redhat.com/xen-pvops-64.git
> >>> tree? I pulled that tree and tried building 64-bit Xen domU support
> >>> (since this tree allows you to configure the kernel with that
> >>> capability, unlike the vanilla Linux tree). But compilation
> >>> failed in
> >>> enlighten.c because xen_smp_ops isn't defined in x86_64.
> >
> > Try building without CONFIG_SMP, it doesn't support that yet.
>
> Other than SMP support, does the tree represent a fully functional 64-
> bit PV domU support?
No, it's a work-in-progress - ia32 emulation is also missing and we're
tracking down a nasty pagetable pinning bug atm.
Even then it would only be on par with 32-bit pv_ops DomU, which itself
doesn't yet have all the Xen features of 2.6.18 tree.
> Does it also allow all hypercalls? Put another
> way: is a 64-bit PV domU from that tree less capable than a 64-bit PV
> domU from Xen's linux-2.6.18.8 tree?
It depends on how you define "less capable" - e.g. some might think a
tree based on a 1.5 year old kernel is less capable even if it does
have more xen features ... :-)
> >> Redhat have some patches which they're shipping in Fedora 9. Once
> >> F9 is
> >> out the door, I'm hoping they'll polish them into an upstreamable
> >> form.
> >> I don't know whether that git tree represents what's in F9, or if
> >> that's
> >> somewhere else; at the very least I'd expect you'd be able to pull
> >> the
> >> patches out of the srpm.
> >
> > Yep, this tree:
> >
> > http://git.et.redhat.com/?p=xen-pvops-64.git
> >
> > is the work-in-progress x86_64 tree.
> >
> > This tree:
> >
> > http://git.et.redhat.com/?p=linux-2.6-fedora-pvops.git
> >
> > is what we're actually shipping for F-9. It includes the x86_64 work,
> > but some other paravirt_ops patches too, most of which are queued up
> > upstream.
>
> Which tree do you recommend I use?
I'd use the xen-pvops-64 tree unless you are specifically wanting to
help with Fedora's kernel-xen packages.
Cheers,
Mark.
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