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

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 15/10/2013 16:18, Fabio Fantoni ha scritto:
> Il 15/10/2013 11:45, Wei Liu ha scritto:
> > 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.
> I not found xenconsoled log, it seems not running: "ps ax | grep 
> xenconsoled" returns nothing and the /var/run/xenconsoled.pid has 
> stored pid of died process.
> I tried to restart xenconsoled manually and after that xl console 
> returns working.
> I'll do a completly fresh system on the next days and I will let you 
> know.
I did a full clean test system and for now xenconsoled is not crashed.
I will keep xl console tested more often to find the cause if re-happen.

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