[Fedora-xen] [IA64]We have successfully booted dom0/domU/domVTI (xen/ia64) on FC5

[Zhang, Xiantao]

Hi, all,
	After some hard debug and work around, now we've got xen/ia64
dom0/domU/domVTI both up on FC5-IA64. Attached is the snapshot.

	We still use python2.4.2 contained in FC5 for test. 

	We need following changes to make things happen:

	- xen-tools is not built and integrated into the RPM package.
Typically we know there're 3 major directories on xen-ia64-unstable.hg:
xen,linux-sparse and tools. All three need to be kept consistence with
each other. However current fedora-kernel-ia64 only incorporates former
two and tools is totally missed. We tried to build the tools
individually from xen-ia64-unstable under same Rev (10150), and then
install to target box manually. 

	- The configuration files for dom0/domU seems a big difference
compared to xen-ia64-unstable.hg. (Why?) Currently the ext3 is compiled
as module, however initrd doesn't work for domU even when we add
"ramdisk=" in config file. So we change ext3 to be kernel built-in, and
then domU can boot up immediately.
		* Xen-ia64-unstable.hg doesn't have IDE devices
configured for domU, however fedora-kernel-ia64 does, which wastes much
time for probe. If the configuration file can be kept consistence with
xen-ia64-unstable.hg, above issues are gone.

	After above 2 changes, both domU and domVTI can be boot
successfully.

	Following are other tricky issues we've observed:
	- brctl package is not integrated into FC5 and so vnif is not
available now. People need to install brctl manually and we'll try
network later. Is it possible to add dependency check upon brctl in spec
file?

	- When installing xen0 rpm package, it depends on xen rpm
package. However we didn't find the xen rpm package, and had to install
with "nodeps". Actually xen image has been included in xen0 rpm package.

	- Is it possible to use same configuration file for xen0/xenU
just like current xen-ia64-unstable.hg? Or at least give a configuration
option to user in spec.

	- Even everything works now, we kept seeing some boring call
trace from BUG in mm/slab.c:2818, especially when vncserver is started.
Actually even dom0 itself will encounter such warning infrequently
before xend start.

Cheers!
-Xiantao and Kevin

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