Re: [Xen-users] Problem with Xen and OCFS2

[Gonçalo Borges <goncalo@xxxxxx>]

Hi Nick

Up to know it seems it some interoperability issue between OCFS2 and Xen, regarding the locking of devices (as you said).
I'm searching the issue, and asked in the OCFS2 list also... I'll let you know if I come to a conclusion...

Cheers
Goncalo

On 08/21/2009 05:38 PM, Nick Couchman wrote:

I have exactly the same issue and have posted a couple of times on this list without any response.  I'm guessing there's something about file locking on OCFS2 that doesn't work quite right for the xm save process, but I could be wrong.  I'm interested to see if you get any hits on this thread that help to track down the problem...

-Nick

>>> On 2009/08/21 at 08:42, Gonçalo Borges<goncalo@xxxxxx> wrote:

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

---

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