Hello,
kernels >= 4.12 do not work on one of our main routers. They crash as soon as
ipsec-tunnels are configured and ipsec-traffic actually flows.
Just configuring ipsec (that is starting strongswan) does not trigger the
oops.
I finally found time to bisect that. Though I have not completed that yet, I
already narrowed it down to the following commits
good: d24406c85d123df773bc4df88ad5da2233896919
udp: call dst_hold_safe() in udp_sk_rx_set_dst()
bad: 5b7c9a8ff828287af5aebe93e707271bf1a82cc3
net: remove dst gc related code
Commits in between are almost all changes to remove dst gc.
Now we have other machines which run just fine with the very same kernels
doing ipsec. They differ insofar as they have much less cores, do not use the
ixgbe driver, do not have 10G and terminate only a few tunnels instead of
hundreds.
I already tested distribution kernels > 4.12 from debian, they also crash.
Regards,
--
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
