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

[Keir Fraser <keir.fraser@eu.citrix.com>]

Yes, one possibility here is that somehow you do not have xenconsoled
running. You should 'ps auxw' in dom0 and check that xenstored and
xenconsoled are both running.

I now start xend with a little 'xenstored; xenconsoled; xend start' script.
:-)

 -- Keir

On 24/06/2010 14:08, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:

> Just a thought...
> 
> With all the recent tool layer changes (involving udev, xend,
> bridging etc), any chance that everything in the guest
> is working just fine and everything in the hypervisor
> is working just fine but the connections to the console
> in your distro/configuration are not playing nicely with
> the recent xen-unstable tool changes, so you just can't see
> that everything (else) is fine?
> 
> (if so, please support my recent rant against changes that
> cause "unnecessary pain" ;-)
> 
>> -----Original Message-----
>> From: Kathy Hadley [mailto:Kathy.Hadley@dornerworks.com]
>> Sent: Thursday, June 24, 2010 6:54 AM
>> To: Keir Fraser; George Dunlap
>> Cc: xen-devel@lists.xensource.com
>> Subject: RE: [Xen-devel] [PATCH 1/1] Xen ARINC 653 Scheduler (updated
>> to add support for CPU pools)
>> 
>> We are using the following set-up:
>>   Xen-unstable changeset 21650
>>   Gentoo 2.6.29.6 with Xen patches for Dom0
>>   Linux 2.6.18-Xen for DomU (downloaded from linux-2.6.18-xen.hg)
>> 
>> Dom0 and DomU run fine with Xen-3.4.1 and Xen-4.0.0 (our scheduler or
>> the credit scheduler).  Dom0 appears to run fine with xen-unstable, but
>> DomU "hangs" when our scheduler or the credit scheduler (as discussed
>> in
>> earlier e-mails).  "xm list" shows that DomU is blocked.
>> 
>> Do you have any suggestions for how I could troubleshoot this issue?
>> I'm still wondering about the warning I'm seeing issued from traps.c -
>> while it could have nothing to do with my issue, it is an interesting
>> coincidence.
>> 
>> Thanks,
>>   Kathy Hadley
>> 
>>> -----Original Message-----
>>> From: Keir Fraser [mailto:keir.fraser@eu.citrix.com]
>>> Sent: Wednesday, June 23, 2010 6:36 PM
>>> To: Kathy Hadley; George Dunlap
>>> Cc: xen-devel@lists.xensource.com
>>> 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@dornerworks.com>
>>> 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@eu.citrix.com]
>>>>> Sent: Wednesday, June 23, 2010 4:23 PM
>>>>> To: Kathy Hadley; George Dunlap
>>>>> Cc: xen-devel@lists.xensource.com
>>>>> 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@dornerworks.com>
>>>>> 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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