Xen users - Dec 2007 - Kernel types and xen caps : PV/HVM, 32/64 bit, PAE/non-PAE

Hi
   
Is there a doc/wiki page which explains, the  kind of
domu images/appliances/kernels can be run with what
type of dom0 kernels(xen_caps).

For example :
-- Can a 32 bit, non-PAE domU run on 64 bit, PAE dom 0
in PV mode ? (or HVM mode ?)

Are there any checks that can be done before doing the
migration ?

Is there any programmatic way (from python) to find
out  if the kernel in a domU disk image is 32bit/64
bit/PAE/non-PAE/PV/HVM ?i.e. can I generate xen_caps
like string from the kernel ?


Thanks
/Jd




     
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jd wrote:
> Hi
>    
> Is there a doc/wiki page which explains, the  kind of
> domu images/appliances/kernels can be run with what
> type of dom0 kernels(xen_caps).
> 
> For example :
> -- Can a 32 bit, non-PAE domU run on 64 bit, PAE dom 0
> in PV mode ? (or HVM mode ?)
See entry 1.7 in the FAQ:

http://wiki.xensource.com/xenwiki/XenFaq

I don''t think there''s a "64-bit PAE" - you only get
32-bit, 32-bit PAE,
and 64-bit.
> Are there any checks that can be done before doing the
> migration ?
> 
> Is there any programmatic way (from python) to find
> out  if the kernel in a domU disk image is 32bit/64
> bit/PAE/non-PAE/PV/HVM ?i.e. can I generate xen_caps
> like string from the kernel ?
I don''t know any Python, but the example config file starts with

import os, re
arch = os.uname()[4]
if re.search(''64'', arch):
     arch_libdir = ''lib64''
else:
     arch_libdir = ''lib''

which I think is what you want.

Evan

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