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RE: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated to add supp

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated to add support for CPU pools)
From: "Kathy Hadley" <Kathy.Hadley@xxxxxxxxxxxxxxx>
Date: Wed, 30 Jun 2010 16:44:29 -0400
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
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Thread-topic: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated to add support for CPU pools)
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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