[lvs-users] Kernel 2.6.35 and 100% S.I. CPU Time

John Sullivan jslvs at kanargh.force9.co.uk
Wed Oct 13 13:13:08 BST 2010

On October 6th, Julian Anastasov wrote:
>    Sorry for the delay. I'm attaching new patch for
> testing. You should apply it on backup server. For your
> setup only the last hunk in patch is needed. One of the
> changes will keep the forwarding methods as specified,
> may be you will not see "Local" real servers. If this is
> a problem for you let me know. You can test then only
> the last change in ip_vs_dr_xmit. Attached patch is for
> 2.6.35. It allows backup server after being used as
> DR/TUN server in master to forward locally the packets
> for connections created after sync.

Thanks for this. I've tested it and it passes the test case with none
of the previous failure modes apparent, new connections can be
switched from one server to the other and back by altering the
weights, no machine lockups or wedged/dropped connections. ipvsadm on
both machines now reports both servers as "Route" rather than one of
them as "Local", as you said, but Jarrod says this is not a concern
for us. Further testing will be ongoing, but as far as I can tell at
the moment, this fixes things for us.



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