Re: [Xen-users] Xen / Linux 4.3.3

[krichy@xxxxxxxxxxxx]

In our case, we were using 4.3 from debian jessie-backports. Upon bootup, 
ganeti had started most of the domains, but at one domain the xl command 
started to hang. As it is a production node, I did not have much time to 
debug it, just restarted the machine. After it, exactly the same happened, 
the same domUs got started and at the very same domain did the xl command 
hang. After it I switched back to 4.2.
Patrick: you can even reboot your machine from console with this:
# echo 'b' > /proc/sysrq-trigger

Regards,

Kojedzinszky Richárd
Euronet Magyarorszag Informatika Zrt.

On Tue, 12 Jan 2016, Patrick Velder wrote:

> Date: Tue, 12 Jan 2016 12:17:26 +0100
> From: Patrick Velder <lists@xxxxxxxxx>
> To: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
> Cc: "xen-users@xxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxx>
> Subject: Re: [Xen-users] Xen / Linux 4.3.3
>
> Hi George
>
> Thanks for your reply.
>
> 1) Yes, correct.
>
> 2) The domains in the autostart are started.
>
> I can do nothing with XL. If I exec xl, I cannot stop it with CTRL+C / kill 
> -9. I can not even reboot the Domain0 with reboot -f.The server needs to be 
> resetted with IPMI or physical.
> Yes, I'm using systemd. I will have a look at it.
>
> Best Regards
> Patrick
>
> On 12.01.2016 11:57, George Dunlap wrote:
> > On Fri, Jan 8, 2016 at 9:38 PM, Patrick Velder <lists@xxxxxxxxx> wrote:
> > > Hi
> > >
> > > I just tried to boot kernel 4.3.3 on my xen host. xl list does not work
> > > (freezes), but the domUs are up. Reboot is impossible, and it's not 
> > > possible
> > > to kill the hanging xl processes.
> > > Any ideas? I'm using debian 8 with xen from the debian repositories.
> > Sorry, just to clarify:
> >
> > 1. You're running Debian 8 (Jessie) in dom0, and you built your own
> > 4.3.3 Linux kernel
> >
> > 2. Either "xl create" works, or the "xendomains" script works, because
> > you are able to start domUs after rebooting into Linux 4.3.3?
> >
> > Normally if "xl list" hangs it's because xenstored isn't responding;
> > but in that case, I wouldn't expect you to be able to create domU's
> > either (although I suppose it might work by accident).
> >
> > Can you run "ps ax | grep xenstored" in your dom0 to see if it's running?
> >
> > Also, are you running sysvinit or systemd?  If the latter, use
> > systemctl and journalctl to see the status of xenstored and any error
> > messages.
> >
> >   -George
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxx
> > http://lists.xen.org/xen-users
>
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