Re: [Xen-devel] remus fail with SMP domU

[Shriram Rajagopalan <rshriram@xxxxxxxxx>]

On Wed, Feb 8, 2012 at 9:49 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:

On Wed, Feb 08, 2012 at 04:59:18PM +0100, mailinglist@xxxxxxxxxxxxxxxxxxx wrote:
> Dear List,
>

Hello,

> i'm experimenting with remus with the following setup.
>
> dom0:
> - Debian Squeeze
> - Jeremy's 2.6.38.48 kernel
> - xen 4.1.2 recompiled from sid
> - DRBD for block device backend
>

Did you try xen-unstable? There are many Remus related fixes/enhancements in xen-unstable.

IIRC, all fixes were backported to xen-4.1-testing.
 

-- Pasi

> domU
> - Debian Squeeze
>
> Remus is working fine unless i try to give more than 1 core to the domU.
>

The problem arises from your domU config file:
cpus = "1-15"

The python parser is unable to parse the cpu spec in this format. I think even
cpus = "^0" throws an error of similar sort.

One solution is to remove this line, boot the domU,
and do xm vcpu-pin command to restrict the physical cpus
on which you wish the domU to run.


shriram
 

> Here's the error from remus when i'm trying to enable it for an SMP domU:
>
> Traceback (most recent call last):
>   File "/usr/lib/xen-4.1/lib/python/remus", line 219, in <module>
>     run(cfg)
>   File "/usr/lib/xen-4.1/lib/python/remus", line 109, in run
>     dom = vm.VM(cfg.domid)
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 32, in __init__
>     self.loaddominfo()
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 35, in loaddominfo
>     self.dom = parsedominfo(self.dominfo)
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 77, in
> parsedominfo
>     return s2d(dominfo[1:])
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 61, in s2d
>     val = s2d(elem[1:])
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 64, in s2d
>     return s2d(elem)
>   File "/usr/lib/xen-4.1/lib/python/xen/remus/vm.py", line 66, in s2d
>     for k, v in val.iteritems():
> AttributeError: 'int' object has no attribute 'iteritems'
>
> I've attached the domU configuration file.
>
> Please let me know if you need more info on this.
>
> Best regards,
> Mate

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