Re: [Xen-users] DomU stuck in boot

[Thomas Graves <tgraves@xxxxxxxxxxxxx>]

Sorry my reply formatting got messed up, reposting with it fixed.

> On Thu, Jun 17, 2010 at 4:31 AM, Thomas Graves <tgraves@xxxxxxxxxxxxx> wrote:
> >>Hello,
> >>
> >>I am running xen-3.3.1 with rhel5.3 dom0.
> >>I have a rhel5.3 domU that is stuck in the boot process. It seems it is
> >> trying to bring up the network.  We see this problem only occassionally.
>
> > So it's not login console not displayed, only something that happens
> > occasionally?
Right, I’ve seen it happen 3 times in the past month or so.  It will start to boot and I can see the console up to the the line  ( Bringing up loopback interface:  [  OK  ]) and then the console stops and it never gets to the login prompt and the network isn’t up yet so I can’t get into it.  
> >> It has been stuck for a few days now. I did a dump-core on it and it seems
> >> to be doing network start -> ifup-eth ifcfg-eth0 boot -> ip link set dev
> >> eth0 up -> hypercall.  I'm somewhat assuming it made the hypercall but never
> >> got the event back but I'm not sure as I'm new to this.   Does anyone have a
> >> good pointers on how exactly hypercalls work or any info on looking at
> >> event-channels?  Any ideas why it might be stuck?
>
> > I never had this problem, but here's several things you might want to try:
> > - udate your OS. RHEL 5.5. is out already. At least update your kernel-xen rpm.
> > - update your Xen version. Xen 3.4.2 (the easy way is from Gitco) has
> > been quite stable for me. If you want to try latest version, you could
> > also test Xen 4.0
I actually just upgraded a box to rhel5.4 and xen3.4.2 so I’ll try it there to see if I see it but since it doesn’t happen very often probably won’t know for sure for a while.   

Any pointers on good reads on debugging the events or ring buffers?  Like how to map xenstore info to something useful to look at:
 tx-ring-ref = "768"
 rx-ring-ref = "769"
 event-channel = "14"
>
Thanks again
Tom 
>



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