Re: [Xen-ia64-devel] Xen/ia64 roadmap

[Alex Williamson <alex.williamson@xxxxxx>]

On Thu, 2007-10-18 at 11:22 +0900, Isaku Yamahata wrote:
> On Wed, Oct 17, 2007 at 10:03:14AM -0600, Alex Williamson wrote:
> >       * Increasing Xen page size (discussed a little at OLS)
> 
> What motivates this? I don't know the discussion.
> I'm guessing the reason behind it.
> - catching up linux deafult page size chage
> - removing current pseudo physical addrese size limit
>   Why not moving from 3 level p2m table to 4 level p2m table?
> anyother reason?

   I think the main factors were address space and performance.  A 4
level table might be an easier way to deal with the address space side.

> Some random ideas. I hope they will help starting discussions.
> 
>         * NUMA emu (something like Linux x86_64 NUMA_EMU)
>           This would be convenient for developing NUMA support on
>           non-NUMA box.

   I like this idea, at least as a development feature.

>         * scalability
>           While some hard limit is there as Alex already mentioned,
>           Does the current implementation of other part scale as we want?
>           If no, which subsystem to rewrite?

   Yes, another good area for investigation.  I'm not aware of any real
data in this space.

>         * debugging tools for xen vmm itself/tools stack/guest OS
>           Currently we have Kexec/Kdump, xm dump-core, xenitp, and
>           misc tools. Do we want any others?
>           e.g. nested Xen or something like Linux 'crash /dev/kcore',
>                Linux LTT, systemtap...
>         * fast hypercall using gate page
>         * super page/hugetlbfs support
>         * PMU virtualization

   Good, I added all these.

>         * performance isolation

   Can you describe what you mean by this?

I updated the wiki, feel free to make modification and add stuff there
on your own.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel