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Re: 32 bit domU, 64 bit dom0?: msg#00054
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Subject: |
Re: 32 bit domU, 64 bit dom0? |
Tom Horsley wrote:
I tried to follow the instructions in the FC6 Xen fedoraproject wiki
page and tried installing 32 bit FC6 guest while booted in x86_64 dom0,
the virt-manager tells me invalid argument and the xend-debug.log
file says ERROR: Kernel not a Xen-compatible Elf image.
Does this mean it is, in fact, impossible to run a 32bit guest
(x86 architecture) on a 64 bit x86_64 host?
Or does it just mean virt-manager isn't prepared to try doing an
install from a 32 bit fedora install tree?
Installing an x86_64 guest seems to be working fine, by the way.
(I can't ever seem to find a plain statement about 32 versus 64
bit compatibility under Xen, though I have seen plain statements
that I can't run a 64 bit guest under and 32 bit host, which
sort of implies by omission that maybe I can run a 32 bit guest
under a 64 bit host as long as we are talking x86 architecture
in general).
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Fedora-xen mailing list
Fedora-xen@xxxxxxxxxx
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No, this isn't a limitation of virt-manager; it's a limitation of Xen. The
problem with a clear statement is that things are always moving :). As far as
I know, it currently stands like this (where domU is paravirtualized domains
and HVM is fully-virtualized domains):
Hypervisor dom0 domU HVM
-------------------------------------------------------------
32-bit 32-bit 32-bit 32-bit
32-bit PAE 32-bit PAE 32-bit PAE 32-bit PAE
64-bit 64-bit 64-bit 32- or 64-bit
There is ongoing work upstream to allow 32-bit domU's to run on 64-bit
hypervisors, but that doesn't work right now.
Chris Lalancette
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