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xen-users
Re: [Xen-users] 32 & 64 & the FAQ
> On Saturday 04 August 2007, Dylan Martin wrote:
> > 1) What really is 32-on-64? From what I've read I should be able to
> > run 32bit PV domUs on a 64bit dom0 with 3.1.0. I've tried it and it
> > only works with a 64 bit kernel. What am I missing?
>
> As it says on the wiki the 32bit PV kernel is required to have PAE. Did
> you remember that? What error did you get?
I might have forgotten to use a PAE kernel, but see below.
> I just tried it out with dom0 64bit and domU 32bit PAE
> On an AMD single core system(64 3700+) it worked just fine and it runs 32
> bit PAE and 64bit domUs at the same time.
> On an Intel dual dual core system (2x5120) however the 32bit PAE kernel
> panics before mounting the root filesystem. Something about not being
> able to read superblock on xvda1.
Ah ha! My hardware is Intel dual-core and I had panics from xvda1 too.
Sounds like a bug!
> All of the kernels are compiled from xensource 3.1 except the intel system
> which uses 2.6.20 from gentoo xen overlay. So maybe that is the problem.
Mine was Fedora 7 and I had the same error.
> And what I would like to know is which combination will perform best of
> the 2 choices of 32bit userland/64bit kernel and 32bit userland/32bit
> kernel both on a 64 bit dom0. And are there other
> advantages/disadvantages of the 2 choices.
>
> --
> Jesper
> 20:20:52 up 1 day, 1:25, 11 users, load average: 0.12, 0.07, 0.01
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
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