On 7/13/26 1:52 PM, David Marchand wrote:
> On Fri, 10 Jul 2026 at 09:09, David Marchand via dev
> <[email protected]> wrote:
>>
>> Instead of dropping we can switch to software segmentation before
>> encapsulating packets already encapsulated in a tunnel.
>>
>> Signed-off-by: David Marchand <[email protected]>
>
> Recheck-request: github-robot
FWIW, while the test failure is sort of related to the set, the
issue is in the test. AFAIU, what happened is an icmp6 packet
entered OpenFlow pipeline before all the rules were installed
and hit a bunch of resubmits with the output to local port
without reaching the resubmit limit creating the datapath flow
with a ton of output actions to the same local port, resulting
in the large number of clones queued for output to the same
port, which was reflected in the output batch growing.
The solution here would be to properly allow icmpv6 packets
to flow via normal action, setting correct priorities and using
a bundle to avoid partial pipeline execution.
Something like this:
diff --git a/tests/system-traffic.at b/tests/system-traffic.at
index 62567028e..6550f90d9 100644
--- a/tests/system-traffic.at
+++ b/tests/system-traffic.at
@@ -2538,14 +2538,17 @@ ADD_VETH(p0, at_ns0, br0, "10.1.1.1/24")
ADD_VETH(p1, at_ns1, br0, "10.1.1.2/24")
dnl Exceed the max number of resubmits.
-(echo "dl_type=0x806, actions=normal"
+(
+echo "priority=100, arp, actions=normal"
+echo "priority=100, icmp6, actions=normal"
+
for i in $(seq 1 64); do
j=$(expr $i + 1)
- echo "in_port=$i, actions=resubmit:$j, resubmit:$j, local"
- done
- echo "in_port=65, actions=local"
+ echo "priority=0, in_port=$i, actions=resubmit:$j, resubmit:$j, local"
+done
+echo "priority=0, in_port=65, actions=local"
) > flows.txt
-AT_CHECK([ovs-ofctl add-flows br0 flows.txt])
+AT_CHECK([ovs-ofctl add-flows --bundle br0 flows.txt])
dnl Generate some traffic.
NS_CHECK_EXEC([at_ns0], [ping -q -c 10 -i 0.1 -w 2 10.1.1.2], [1], [ignore])
--
I'll do some more testing and send this as a separate fix.
Best regards, Ilya Maximets.
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