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RE: [Xen-devel] More driver domain issues - rebooting backend hangs

To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] More driver domain issues - rebooting backend hangs
From: "B.G. Bruce" <bgb@xxxxxxxxx>
Date: Mon, 07 Feb 2005 09:48:03 -0400
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Thanks for the response Ian.

I've tried this with xen-2.0.3, 2.0.4 and xen-2.0-testing.bk (the latest
from yesterday at 16:00 AST -4:00).  Looking into the
xend.log/xend-debug.log files, what it appears I should see is:

[2005-02-06 21:13:28 xend] INFO (XendRoot:91) EVENT>
xend.domain.shutdown ['be03-3c59x', '3', 'poweroff']
[2005-02-06 21:13:38 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 21:13:38 xend] INFO (XendRoot:91) EVENT> xend.virq 4
[2005-02-06 21:13:38 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 21:13:38 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']
[2005-02-06 21:13:39 xend] INFO (XendRoot:91) EVENT> xend.domain.died
['be03-3c59x', '3']

but instead get (looping):

[2005-02-06 20:30:22 xend] INFO (XendRoot:91) EVENT>
xend.domain.shutdown ['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:30:34 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 20:30:34 xend] INFO (XendRoot:91) EVENT> xend.virq 4
[2005-02-06 20:30:34 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:30:34 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']
[2005-02-06 20:32:58 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 20:32:58 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:32:58 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']
[2005-02-06 20:33:01 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 20:33:01 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:33:01 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']
[2005-02-06 20:33:03 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 20:33:03 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:33:03 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']
[2005-02-06 20:33:05 xend] INFO (XendDomain:564) Destroying domain:
name=be03-3c59x
[2005-02-06 20:33:05 xend] INFO (XendRoot:91) EVENT> xend.domain.exit
['be03-3c59x', '3', 'poweroff']
[2005-02-06 20:33:05 xend] INFO (XendRoot:91) EVENT> xend.domain.destroy
['be03-3c59x', '3']


On Sun, 2005-02-06 at 21:51, Ian Pratt wrote:
> > When rebooting the backend driver domain, if it has been utilized by a
> > normal domU, it will close down properly and then hang (not 
> > reboot). I'm
> > left rebooting the whole box.  Is this to be expected?  This even
> > happens if the normal domU has been powered off.
> 
> It certainly never used to be a problem with the old xend, but running
> separate driver domains has not been widely tested with the current one.
> 
> If you're using a debug build of Xen with a serial console, it might be
> worth hitting 'o' to find out what resources the domain is still
> holding.

I will try this and email you back

> Ian
> 

If there is any other information that I can/should provide, please let
me know.

B.


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