Xen and OCFS interoperability issue

["Gonçalo Borges" <goncalo@lip.pt>]

Hi Xen devel people...

I've sent the following message to xen-users mailing list with no feedback.
Indeed, it seems more of a devel issue, than a user one.

Can someone of you shed some light in here?

Cheers and Thanks
Goncalo

> Hi All...
>
> I'm testing a Xen solution on an OCFS2 SAN to store VM images.
>
> If I try to save a VM asking to store the file in any Dom0 local dir
> (ex: /tmp) everything works fine, and I can properly restore the VM
> afterwards. Nevertheless, It I try to save a VM asking to store the
> saved file inside the OCFS2 SAN, it fails with the following messages in
> xend.log
>
> ---*---
>
> [2009-08-21 14:45:25 xend 9720] DEBUG (XendCheckpoint:89) [xc_save]:
> /usr/lib64/xen/bin/xc_save 26 9 0 0 0
> [2009-08-21 14:45:25 xend 9720] DEBUG (XendCheckpoint:322) suspend
> [2009-08-21 14:45:25 xend 9720] DEBUG (XendCheckpoint:92) In
> saveInputHandler suspend
> [2009-08-21 14:45:25 xend 9720] DEBUG (XendCheckpoint:94) Suspending 9 ...
> [2009-08-21 14:45:25 xend.XendDomainInfo 9720] DEBUG
> (XendDomainInfo:1036) XendDomainInfo.handleShutdownWatch
> [2009-08-21 14:45:25 xend.XendDomainInfo 9720] DEBUG
> (XendDomainInfo:1036) XendDomainInfo.handleShutdownWatch
> [2009-08-21 14:45:25 xend.XendDomainInfo 9720] INFO (XendDomainInfo:994)
> Domain has shutdown: name=migrating-one-0 id=9 reason=suspend.
> [2009-08-21 14:45:25 xend 9720] INFO (XendCheckpoint:99) Domain 9 
> suspended.
> [2009-08-21 14:45:25 xend 9720] DEBUG (XendCheckpoint:108) Written done
> [2009-08-21 14:45:25 xend 9720] INFO (XendCheckpoint:351) Had 0
> unexplained entries in p2m table
> [2009-08-21 14:45:25 xend 9720] INFO (XendCheckpoint:351) Saving memory
> pages: iter 1   0%ERROR Internal error: Error when writing to state file
> (5) (errno 14)
> [2009-08-21 14:45:25 xend 9720] INFO (XendCheckpoint:351) Save exit rc=1
> [2009-08-21 14:45:25 xend 9720] ERROR (XendCheckpoint:133) Save failed
> on domain one-0 (9).
> Traceback (most recent call last):
>    File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
> line 110, in save
>      forkHelper(cmd, fd, saveInputHandler, False)
>    File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py",
> line 339, in forkHelper
>      raise XendError("%s failed" % string.join(cmd))
> XendError: /usr/lib64/xen/bin/xc_save 26 9 0 0 0 failed
>
> ---*---
>
> It seems I'm not the only one complaining about this issue, according to
> the following threads:
>
> http://lists.xensource.com/archives/html/xen-users/2009-04/msg00670.html
> http://lists.xensource.com/archives/html/xen-users/2008-09/msg00948.html
>
> I wonder is there is some workaround for the problem?
>
> Cheers
> Goncalo