Thanks for the reply. I actually came across that thread yesterday after I originally sent the first e-mail. I've disabled checksumming using ethtool -K described and it's been working great. It was also documented in this thread:<div>
<br></div><div><a href="https://bugzilla.redhat.com/show_bug.cgi?id=443621">https://bugzilla.redhat.com/show_bug.cgi?id=443621</a><br><div><div><br></div><div>Thanks again,</div><div><br></div><div>hany<br><br><div class="gmail_quote">
On Thu, Apr 8, 2010 at 4:09 PM, Lars Ellenberg <span dir="ltr"><<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5">On Thu, Apr 08, 2010 at 08:48:54PM +0200, Florian Haas wrote:<br>
> On 04/08/2010 08:14 PM, Hany Fahim wrote:<br>
> > Hi,<br>
> ><br>
> > I'm currently running a Xen setup using the CentOS distribution DRBD<br>
> > 8.3.2 from Extras Repo. I'm running into consistent kernel panics when<br>
> > I'm benchmarking the individual DomUs. When the primary node crashes,<br>
> > the secondary also panics shortly after and the two servers reboot in<br>
> > tandem. Doing a search in Google, I found someone else who has the exact<br>
> > same issue as I do:<br>
> ><br>
> > <a href="http://lists.centos.org/pipermail/centos-virt/2008-December/000775.html" target="_blank">http://lists.centos.org/pipermail/centos-virt/2008-December/000775.html</a><br>
><br>
> And it was answered here:<br>
><br>
> <a href="http://lists.linbit.com/pipermail/drbd-user/2008-December/011092.html" target="_blank">http://lists.linbit.com/pipermail/drbd-user/2008-December/011092.html</a><br>
><br>
> Maybe Maros can share additional findings.<br>
<br>
<br>
</div></div>Actually, it later turned out to be likely related to this:<br>
<a href="http://www.gossamer-threads.com/lists/drbd/users/17207" target="_blank">http://www.gossamer-threads.com/lists/drbd/users/17207</a><br>
(read the whole thread)<br>
<br>
there are a few more threads on that thing,<br>
but basically you can use 8.3.7, and see it that helps,<br>
upgrade your xen kernel as well,<br>
do some of the ethtool things mentioned in the above thread,<br>
and if none of that helps, disable DRBD's use of sendpage,<br>
which is a module parameter, but can also be toggled at runtime.<br>
<br>
--<br>
: Lars Ellenberg<br>
: LINBIT | Your Way to High Availability<br>
: DRBD/HA support and consulting <a href="http://www.linbit.com" target="_blank">http://www.linbit.com</a><br>
<br>
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.<br>
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</blockquote></div><br></div></div></div>