On 09/08/2011 07:12 PM, Hans van Kranenburg wrote:
When putting disk/network load on one of our office servers, Xen/dom0
crashes. Triple ctrl-a does not react any more on serial console.
We did not encounter this earlier on this particular piece of hardware,
having tortured it some more in the past. A few days ago we set up drbd
on this host [...]
I've been searching some more, using snippets from the stacktrace. This
seems to be a known issue [1], [2] when using DRBD in combination with Xen.
A workaround should be to set the option disable_sendpage when loading
the drbd module [3], [4].
I remember reading about this some months ago. I've set this option on
both of the Xen/DRBD hosts at the office...
echo 1 > /sys/module/drbd/parameters/disable_sendpage
... and added the "options drbd disable_sendpage=1" into
/etc/modprobe.d/drbd.conf
Next week we'll see what happens when we put some stress on it.
[1] http://www.gossamer-threads.com/lists/drbd/users/16962
[2]
http://www.mentby.com/Group/drbd-user/kernel-panic-in-skbcopybits-squeeze.html
[3] http://www.gossamer-threads.com/lists/drbd/users/19980
[4] http://www.drbd.org/users-guide/s-xen-drbd-mod-params.html
--
Hans van Kranenburg - System / Network Engineer
T +31 (0)10 2760434 | [email protected] | www.mendix.com
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