Hi Brian,
the decision to only support PAE capable hosts was made at the end
of the FC5 cycle. The majority (if not all)
of server in customer datacenters/environments are PAE capable today
and the only edge case for non-PAE
support would have been "older" laptops which do not yet have PAE
capable processors.
It also would have been an additional burden for QA/QE to
test/certify older non-PAE capable servers.
As the use case for Xen is certainly geared towards servers and not
laptops this made a lot of sense.
However there are quite a number of folks with laptops which do not
support PAE and at this time you
have two options. either get a PAE capable laptop :) or you could
build your own customer kernel-xen/Xen
packages/RPMs and disable PAE for them.
However the use case for a non-PAE installation is pretty limited as
you'd also have to build your
own installation tree with a non-PAE PV guest etc....
Hth,
Jan
Brian Long wrote:
Can someone more familiar with Xen development help me understand why
PAE extensions are now required? I remember running FC rawhide Xen on
my IBM Thinkpad 42P (Intel Pentium M w/o PAE) and I got paravirt working
(6-9 months ago, I believe). Now it seems PAE is hard-coded in the RHEL
5 and FC6 kernels so I'm SOL.
Thanks.
/Brian/
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