RE: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated to add support for CPU pools)

["Kathy Hadley" <Kathy.Hadley@xxxxxxxxxxxxxxx>]

Good afternoon,
  We have determined that changeset 21507 introduced the error that
prevents unprivileged domains from running on our machine using the
32-bit hypervisor.

  With changeset 21506, we are able to run unprivileged domains using
the credit scheduler.  We cannot do so with changeset 21507 (or
subsequent changesets) -- the unprivileged domains appear to be stuck in
an idle loop (as indicated by the call trace below).

  I'd appreciate help addressing this issue.

  Thanks,
Kathy Hadley

> -----Original Message-----
> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
> Sent: Wednesday, June 23, 2010 6:36 PM
> To: Kathy Hadley; George Dunlap
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated
> to add support for CPU pools)
> 
> I've just built latest xen-unstable.hg and linux-2.6.18-xen.hg and
> booted a
> domU just fine. All my builds are 64-bit though whereas yours are 32-
> bit. I
> suppose that could cause a difference (in particular, 32-bit
hypervisor
> is
> less tested by people).
> 
>  -- Keir
> 
> On 23/06/2010 22:16, "Kathy Hadley" <Kathy.Hadley@xxxxxxxxxxxxxxx>
> wrote:
> 
> > Keir,
> >   I see this same behavior when I run the credit scheduler.  It
> doesn't
> > look like it's localized to the scheduler I'm working on.  I pulled
> the
> > latest code from http://xenbits.xensource.com/linux-2.6.18-xen.hg
and
> > rebuilt the kernel earlier today, with no effect.
> >
> >   Note that I can successfully start the domain with Xen-3.4.1 and
> > Xen-4.0.0, using the same configuration file as I am using with
> > xen-unstable.
> >
> > Kathy
> >
> >> -----Original Message-----
> >> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
> >> Sent: Wednesday, June 23, 2010 4:23 PM
> >> To: Kathy Hadley; George Dunlap
> >> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> >> Subject: Re: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler
> (updated
> >> to add support for CPU pools)
> >>
> >> On 23/06/2010 20:57, "Kathy Hadley" <Kathy.Hadley@xxxxxxxxxxxxxxx>
> >> wrote:
> >>
> >>> Call Trace:
> >>>   [<c01013a7>] hypercall_page+0x3a7  <--
> >>>   [<c0109005>] raw_safe_halt+0xa5
> >>>   [<c0104789>] xen_idle+0x49
> >>>   [<c010482d>] cpu_idle+0x8d
> >>>   [<c0404895>] start_kernel+0x3f5
> >>>   [<c04041d0>] do_early_param+0x80
> >>>
> >>>   Does this shed any light on the situation?
> >>
> >> Looks like you're in the idle loop. So, no, it doesn't really shed
> > much
> >> useful light.
> >>
> >>  -- Keir
> >>
> >
> 


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