[Xen-devel] Kernel image does not exist

[ramsdell@xxxxxxxxx (John D. Ramsdell)]

I noticed some interesting improvements to Mini-OS announced on this
list, so I thought I'd try them out.  Before looking at the new
features, I ran into a problem starting a Mini-OS domain.

I've just performed a fresh install of Fedora Core 6, and installed
xen, kernel-xen, and virt-manager, and booted up xen.  Next I pulled
the latest version of xen-unstable.hg, cd'd into extra/mini-os, and
successfully made mini-os.elf.  When I attempt to start the kernel, xm
claimed the kernel did not exist!

[ramsdell@goo luaxen]$ su -
Password: 
[root@goo ~]# cd /home/ramsdell/repo/xen-unstable.hg/extras/mini-os/
[root@goo mini-os]# xm create -c domain_config 
Using config file "domain_config".
Error: Kernel image does not exist: 
/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/mini-os.elf

But it's easy to see it really is there.

[root@goo mini-os]# file 
/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/mini-os.elf
/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/mini-os.elf: ELF 32-bit LSB 
executable, Intel 80386, version 1 (SYSV), statically linked, not stripped

As near as I can tell, the error message is generated by
../../tools/python/xen/xend/image.py on line 129.

        if not os.path.isfile(self.kernel):
            raise VmError('Kernel image does not exist: %s' % self.kernel)

So you might think that os.path.isfile is broken.  Not so.

[root@goo mini-os]# python
Python 2.4.4 (#1, Oct 23 2006, 13:58:00) 
[GCC 4.1.1 20061011 (Red Hat 4.1.1-30)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os.path
>>> print 
>>> (os.path.isfile("/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/mini-os.elf"))
True
>>> print 
>>> (os.path.isfile("/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/Makefile"))
True
>>> print 
>>> (os.path.isfile("/home/ramsdell/repo/xen-unstable.hg/extras/mini-os/missing"))
False
>>> 

I must be doing something silly.  If not, should I send this bug
report to the Xen bug list or the Fedora bug list?

John

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