Re: [Xen-users] "xl create" hangs

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-09-11 at 10:23 -0400, QI Wen wrote:
> Hi, Ian,
> 
> Thank you very much. 
> 
> The xenstore process is running. The output of xenstore-ls -f is attached
> for your reference.
> 
> Accidentally, with "xl create", we got one vm listed (as shown bellow).
>  However, the Mem and VCPUS are both 0. We think there is no problem with
> the configure file "xen2.cfg". Because in another server, we can launch
> the VM with the same configure file. 
> 
> root@ubuntu:~# xl list
> Name                        ID   Mem VCPUs    State   Time(s)
> Domain-0                     0 14692     8     r-----     269.0
> xen2                         1     0     0     --p---       0.0
> 
> 
> We did follow the same process to build and install XEN in two servers.
> In the first one, it works. But in the second one, we are encountering
> errors as described as above. Thank you very much for your help.

I don't really have a clue what's going on. It looks almost like a mutex
has been leaked locked or something. If you reboot the host does it
immediately get back into exactly this state or was this a one time event?

Ian.

> 
> Regards
> Wen QI
> 
> 
> On Fri, Sep 11, 2015 at 3:25 AM, Ian Campbell <ian.campbell@xxxxxxxxxx>
> wrote:
> > On Thu, 2015-09-10 at 18:31 -0400, QI Wen wrote:
> > > Hi, all,
> > >
> > > Just now, updated the XEN debug level to "all" and tried "xl -v
> > > create" again, still no output except "Parsing config from xen2.cfg".
> > >
> > > But I found that, with "dmesg", I got "task xenconsoled:1218 blocked
> > > for more than 120 seconds." and "task xl:1370 blocked for more than
> > > 120 seconds.", as shown in bellow. The complete log can be found in
> > > the attachments.
> > 
> > Is there a xenstored process running?
> > 
> > > Logs with "xl dmesg" are also attached, in which many logs like
> > > "(XEN) traps.c:2514:d0 Domain attempted WRMSR *** from *** to ***"
> > > are found.
> > 
> > Those are expected with a pvops kernel.
> > 
> > Ian.
> > 

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