Re: Memory allocation going seriously wonky on 4.1.1

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Thu, Oct 06, 2011 at 03:05:50PM +0100, Anthony Wright wrote:
> On 03/10/2011 20:10, Konrad Rzeszutek Wilk wrote:
> > On Mon, Oct 03, 2011 at 02:55:07PM +0100, Anthony Wright wrote:
> >> On 01/10/2011 13:07, Pasi Kärkkäinen wrote:
> >>> On Fri, Sep 30, 2011 at 04:07:06PM +0100, Anthony Wright wrote:
> >>>> Stage 1
> >>>> Everything is fine, Dom0 has 2000MB according to xl list, and 'xl info'
> >>>> says there is 2405MB free.
> >>>>
> >>> - How much memory did dom0 initially have? 
> >>> - Did you use mem= parameter for dom0 kernel (vmlinuz) ?
> >>>
> >>> See: http://wiki.xen.org/xenwiki/Linux_30_bugs
> >> On thing I forgot to mention, is that if I hit or get close to this
> >> memory issue, one time in three/four on reboot the system hangs at the
> >> final reboot request into the kernel.
> > .. are there any guests still sitting around when that happens? If you
> > reboot the machine normally do you see the same issue? (and do you have
> > guests still running when you do this?).
> If I startup and shutdown Dom0 without starting any DomU's the system
> shuts down nicely every time.
> 
> If I startup a fair number of DomUs (23), then I have problems on the
> shutdown every so often. As far as I know there are no DomU's running,
> we do carefully shut them all down as part of the shutdown process, (xl
> shutdown, and then an xl destroy if that doesn't work).
> 
> Surely though if Dom0 dies, shouldn't the whole system be shutdown too?

.. unless there is a bug during the shutdown so that Dom0 gets wedged.

And that is what we are trying to determine. Is there any serial output when
the dom0 reboots with guests?