[Fedora-xen] kernel-xen0-2.6.18-1.2200.fc5 amusingly unhappy

[Daniel P. Berrange]

On Fri, Oct 27, 2006 at 11:43:59PM +0200, Guillaume Bougard wrote:
> Le vendredi 27 octobre 2006 à 16:58 +0100, Daniel P. Berrange a écrit :
> 
> > > I think the problem (and fix) has been described pretty well already  
> > > by Guillaume Bougard:
> > > 
> > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=211745
> > 
> > I find it very hard to believe that changing 'Xend changeset: unavailable"
> > to list an explicit changeset has anything at all todo with the problem.
> > All fedora & RHEL xen builds have the changeset info disabled, and it is
> > not used in any functional codepath path related to the hypervisor or 
> > kernel. It is merely a bit of user facing info.
> > 
> > Dan.
> 
> 
> Hi all,
> 
> just a comment here, what I found is not "changing something to list an
> explicit changeset", for me this was just a clue to understand the
> problem.
> 
> In fact, when I study a little the xen patch really applied with the
> kernel-xen0-2.6.18-1.2200.fc5, I discovered the patch is based on xen
> 3.0.3 which has totally different API than the one expected by the
> xen-3.0.2 installed in FC5 at that time... What I do to fix the problem
> is to find the really patch that should be applied (and it's based on
> xen-3.0.2) and recompiled the kernel, and it was working.

The RPM version number here is a little misleading. The xen-3.0.2-5.FC5
RPM is actually based off a very recent pre-release of the 3.0.3 tree
(changeset 11540). The kernel-xen0-2.6.18-1.20.fc5 is also based off
a pre-release of the 3.0.3 tree (the same changeset  11540) so they
match exactly.

I think, however, I may have just found the problem - it looks like the
/dev/xen/evtchn  device is being created with the wrong major-minor
numbers, causing xenstored to fail, and thus breaking xend. The reason
it /appeared/ to work ok for some people is that xenstored did not get
restarted in %post section of the xen RPM. Going to investigate some 
more to confirm

Regards,
Dan.
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