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On Wed, May 04, 2011 at 04:38:26PM -0400, Kaizaad Bilimorya wrote:
>
> re: http://lists.graemef.net/pipermail/lvs-users/2009-December/022765.html
>
> Just thought I would post an update to this since we saw the same symptoms
> (including the frags from the tcpdump) and our solution might be helpful
> to others.
>
> Turning off generic-receive-offload fixed the problem for us.
>
> # ethtool -k eth1
> ...snip
> generic-receive-offload: on
>
> # ethtool -K eth1 gro off
> ...snip
> generic-receive-offload: off
>
> The network card on the director:
> Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev
> 01)
>
> OS and kernel:
> CentOS release 5.5 (Final)
> Linux 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:52:25 EST 2011 x86_64 x86_64
> x86_64 GNU/Linux
Hi,
there is a problem with LVS+GRO, so turning it off is a good idea.
The problem should be resolved in 2.6.39 (which should be released soon),
and LVS+GRO should be able to co-exist.
LVS+LRO is a similar problem which is yet to be resolved.
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