[Fedora-xen] FWIW: Howto for building F7 and FC6 xen kernels + xen w/o PAE ...
Hi All,
I've successfully built the F7 source RPMS for the xen kernel + xen 3.1
w/o PAE, and it works ok on my PAE-capable dual Xeon w/ 1GB ram. I'm
able to run the following non-pae guests: freeBSD, NetBSD, as well as my
non-PAE F6 and F7 Guests of course.
I followed the wiki instructions here:
http://fedoraproject.org/wiki/Docs/CustomKernel
With the following modifications:
F7:
Using kernel-xen-2.6-2.6.20-2925.11.fc7.src.rpm:
a) with menuconfig, in "processor type and features", "High Memory
Support", I selected "off" (I only have 1GB of memory. Selecting
"4GB"
would also work just as well). I also turned off "64 bit Memory and IO
resources (EXPERIMENTAL)".
b) Just before starting the final rpmbuild, I edited the spec file and
set pae=n. The difference between the standard xen spec file and mine were:
591B> diff kernel-xen.spec *pae*
35c35
< %define release %(R="$Revision: 2925.11 $"; RR="${R##: }"; echo
${RR%%?})%{?dist}
---
%define release %(R="$Revision: 2925.11 $"; RR="${R##:
}"; echo
${RR%%?}).NO_PAE%{?dist}
97,98c97,98
< # we build always xen HV with pae
< %define xen_flags verbose=y crash_debug=y pae=y
---
# we build always xen HV with pae - No we don't.
%define xen_flags verbose=y crash_debug=y pae=n
I installed the resultant RPM on Dom0 and my F7 guests. Note you'll need
to specify --oldpackage, since rpm thinks the currently installed,
redhat-built 2925.11 version is newer for some reason. Reboot ... Now
you're non-PAE, and can utilize all those non-PAE guests out there. And
you can switch back and forth between PAE/non-PAE, by choosing the
appropriate versions of the kernel on dom0 and guests.
FC6 (built for use by my FC6 guest):
Just like F7, with the following exceptions:
a) I used kernel-2.6.20-1.2962.fc6.src.rpm
b) Spec file changes (kernel-2.6.spec) look like:
36c36,37
< %define with_xenonly %{?_with_xenonly: 1} %{?!_with_xenonly: 0}
---
#%define with_xenonly %{?_with_xenonly: 1} %{?!_with_xenonly: 0}
%define with_xenonly 1
64c65
< %define release %(R="$Revision: 1.2962 $"; RR="${R##: }"; echo
${RR%%?})%{?dist}%{?buildid}
---
%define release %(R="$Revision: 1.2962 $"; RR="${R##:
}"; echo
${RR%%?}).NO_PAE.%{?dist}%{?buildid}
178,179c179,180
< # we build always xen i686 HV with pae
< %define xen_flags verbose=y crash_debug=y pae=y
---
# we build always xen i686 HV with pae - No we don't.
%define xen_flags verbose=y crash_debug=y pae=n
I haven't tried to see if FC5 guests work - I suspect they will.
Enjoy,
Mike