Xen users - Sep 2005 - FC4 Xen install won''t boot the xen kernel

Greetings...

I''m a bit earlier in the process than most of you, judging by the
archives.

Trying to set up xen as released by Fedora Core 4.

I start with a minimal install and do:
yum update (lots of packages)
yum install xen (which installs five packeges)
yum install kernel-xenU kernel-xen0 (which installs as requested)
mv /lib/tls /lib/tls.disabled

Then I reboot into the xen0 kernel. The system gets as far as
Switching to new root
unmounting old /proc
unmounting old /sys

and stops.

The console still echoes, and the three-finger-salute still does an orderly 
shutdown, but the system never gets past the above.

I''ve tried this on two systems:
* Dell Precision 410
* Toshiba Tecra 8100
Same install, same yum update first, same xen packages, same result.

Any suggestions?

Thanks,
</edg>



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On Sun, 2005-09-11 at 07:00 -0700, Ed Greenberg wrote:
> Greetings...
> 
> I''m a bit earlier in the process than most of you, judging by the
archives.
> 
> Trying to set up xen as released by Fedora Core 4.
> 
> I start with a minimal install and do:
> yum update (lots of packages)
> yum install xen (which installs five packeges)
> yum install kernel-xenU kernel-xen0 (which installs as requested)
> mv /lib/tls /lib/tls.disabled
> 
> Then I reboot into the xen0 kernel. The system gets as far as
> Switching to new root
> unmounting old /proc
> unmounting old /sys
> 
> and stops.
> 
> The console still echoes, and the three-finger-salute still does an orderly
> shutdown, but the system never gets past the above.
> 
> I''ve tried this on two systems:
> * Dell Precision 410
> * Toshiba Tecra 8100
> Same install, same yum update first, same xen packages, same result.
> 
> Any suggestions?
> 
> Thanks,
> </edg>
Check the archives and Redhat bugzilla.

Ted


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On Sun, 11 Sep 2005, Ed Greenberg wrote:
> unmounting old /proc
> unmounting old /sys
> 
> and stops.
This turned out to be a glibc bug, it segfaults parsing the
VDSO note.  If you boot with "vdso=0" things should work.

Roland gave me a workaround to apply kernel side, and I have
RPMs with this on my page:

	http://people.redhat.com/riel/

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--On Sunday, September 11, 2005 4:06 PM -0400 Rik van Riel 
<riel@redhat.com> wrote:
> On Sun, 11 Sep 2005, Ed Greenberg wrote:
>
>> unmounting old /proc
>> unmounting old /sys
>>
>> and stops.
>
> This turned out to be a glibc bug, it segfaults parsing the
> VDSO note.  If you boot with "vdso=0" things should work.
This did not change anything...
>
> Roland gave me a workaround to apply kernel side, and I have
> RPMs with this on my page:
>
> 	http://people.redhat.com/riel/
But this worked. I downloaded the new kernel packages, uninstalled the old, 
installed the new, and rebooted. The system came all the way up.

I had to create /var/run/xenstored and /var/lib/xenstored, rather than the 
/var/lib/xen/xenstored and /var/run/xen/xenstored versions that were 
referenced in the quickstart. Thanks to a posting on the list that I found 
in archives.

I''ve created three partitions with the appropriate skeletons in them,
and I
plan to yum install them tomorrow when I have better bandwidth.

Thanks,
</edg>


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On Sun, 11 Sep 2005, Ed Greenberg wrote:
> > 	http://people.redhat.com/riel/
> 
> But this worked. I downloaded the new kernel packages, uninstalled the 
> old, installed the new, and rebooted. The system came all the way up.
Awesome.  Thank you for testing the RPMs.
> I had to create /var/run/xenstored and /var/lib/xenstored,
Oops.  I create those directories in the spec file, but forgot
to include them in the %files section.  I''ll put up a new version
later today.

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Being of an inquisitive nature myself, I also tried these .rpms.
They are causing an instant reboot on my system, a dual athlon MP1900,
with an MSI board.

As far as I can see, it happens soon just as xen is booting domain 0.
I also does not work if I use the xen rpm of this directory with older
domain kernels (I don''t know if this was supposed to work or not).

I quickly ran back to -1450_FC4 (from some test directory I think,
 -1447_FC4 works fine also) and xen-2-20050823.i386.rpm (from updates).

Just a data point, no complaints!

Em Monday 12 September 2005 08:55, Rik van Riel
escreveu:
> On Sun, 11 Sep 2005, Ed Greenberg wrote:
> > > 	http://people.redhat.com/riel/
> >
> > But this worked. I downloaded the new kernel packages, uninstalled the
> > old, installed the new, and rebooted. The system came all the way up.
>
> Awesome.  Thank you for testing the RPMs.
>
> > I had to create /var/run/xenstored and /var/lib/xenstored,
>
> Oops.  I create those directories in the spec file, but forgot
> to include them in the %files section.  I''ll put up a new version
> later today.
-- 
Ramiro Brito Willmersdorf  Dep. Engenharia Mecânica/UFPE
ramiro@willmersdorf.net        tel: +55 81 2126-8231e239          

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On Mon, 12 Sep 2005, Ramiro Brito Willmersdorf wrote:
> Being of an inquisitive nature myself, I also tried these .rpms.
> They are causing an instant reboot on my system, a dual athlon MP1900,
> with an MSI board.
Oh dear.

As of yet, I have still not found a xen-unstable snapshot
that works for everybody...

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On Mon, 2005-09-12 at 11:01 -0400, Rik van Riel wrote:
> On Mon, 12 Sep 2005, Ramiro Brito Willmersdorf wrote:
> 
> > Being of an inquisitive nature myself, I also tried these .rpms.
> > They are causing an instant reboot on my system, a dual athlon MP1900,
> > with an MSI board.
> 
> Oh dear.
> 
> As of yet, I have still not found a xen-unstable snapshot
> that works for everybody...
> 
For kicks, has anyone tried building their own kernel after installing
the Xen rpms? 

I have been using source snaps on my smp athlon with fairly good
results, any tests I have tried with the rpms . The biggest caveat for
me would be I use no modules for boot with the snapshot, where as with
rpm install initrd is loading my scsi, network drivers and ext3 driver.
I usually can fiddle and get some DomU''s going but never have any
networking working with rpm install.

Also X related issues on Dom0 on almost every unstable I have tried.
I have a Centos 4.1 with 2.0.7 and X running on Dom0 and so far it seems
stable.

Would be curious in the FC4 kernel monolithic plays nicer. 


Regards,
Ted


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