Re: [Xen-devel] xl console regression on xen-unstable

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Oct 15, 2013 at 10:16:09AM +0100, Ian Campbell wrote:
> On Mon, 2013-10-14 at 16:26 +0100, Wei Liu wrote:
> > On Mon, Oct 14, 2013 at 04:57:48PM +0200, Fabio Fantoni wrote:
> > > Il 14/10/2013 16:29, Wei Liu ha scritto:
> > > >On Mon, Oct 14, 2013 at 04:21:52PM +0200, Fabio Fantoni wrote:
> > > >>Il 14/10/2013 16:02, Wei Liu ha scritto:
> > > >>>On Tue, Oct 08, 2013 at 04:47:17PM +0200, Fabio Fantoni wrote:
> > > >>>>I'm unable to start xl console on latest xen-unstable (build with
> > > >>>>commit 8e0da8c07f4f80e14314977a11f738bd74a5b62b).
> > > >>>>>xl -vvv console sid
> > > >>>>>xenconsole: Could not read tty from store: No such file or directory
> > > >>>It would be good if you can paste the output here.
> > > >>Thanks for reply.
> > > >>The "xenconsole: ..." line is the only output of "xl -vvv console
> > > >>sid" command, before that it shows nothing for some seconds, then
> > > >>return to command line.
> > > >>
> > > >>>>I also tried "xl create -c", and it shows console from pygrub but
> > > >>>>when the "xl create" reaches the end I got the same error:
> > > >>>>>xenconsole: Could not read tty from store: No such file or directory
> > > >>>Please run xl -vvv create -c, paste output here.
> > > >>See on attachment.
> > > >>
> > > >Could you also attach the output of "xenstore-ls" when your DomU is up
> > > >and running.
> > > 
> > > See attachment.
> > > 
> > > Thanks for any reply.
> > > 
> > 
> > That's weird. Xenstore-ls log's tty= field is empty while there's no
> > complain about writing console node in xl -vvv create log.
> 
> xenconsoled writes that node IIRC.
> 

Right, then there should be some info in xenconsoled's log. I wasn't
paying attention to that part because there doesn't seem to be
significant change.

> It's possible that this is a kernel side bug? In that the console is not
> created because of something going on on the guest side.
> 

Fabio, can you check the log of xenconsoled? Is it running normally?

It's a bit hard for me to imagine a guest kernel side bug causing
xenconsoled to misbehave, but that's also possible. If xenconsoled is OK
please follow Ian's suggestion to provide more info.

Wei.

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