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dpif-netdev: Increase MAX_RECIRC_DEPTH to 8.

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In a scenario where OVN does load balancing and then SNAT with a OVS
userspace datapath [0], the recirc_depth may be greater than 6. In
that case, ovs-vswitchd might drop packets and raise warnings:

  dpif_netdev|WARN|Packet dropped. Max recirculation depth exceeded.

Increasing MAX_RECIRC_DEPTH to 8 solves this issue.

[0] dd5cd73e3d/tests/system-ovn-kmod.at (L740)

Reported-at: https://issues.redhat.com/browse/FDP-251
Acked-by: Simon Horman <horms@ovn.org>
Signed-off-by: Jakob Meng <code@jakobmeng.de>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Jakob Meng 2024-01-26 14:24:51 +01:00 committed by Ilya Maximets
parent c7dd0a7b09
commit 5df46a44e8
1 changed files with 1 additions and 1 deletions
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lib/dpif-netdev.c
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@ -99,7 +99,7 @@ VLOG_DEFINE_THIS_MODULE(dpif_netdev);
#define FLOW_DUMP_MAX_BATCH 50
/* Use per thread recirc_depth to prevent recirculation loop. */
#define MAX_RECIRC_DEPTH 6
#define MAX_RECIRC_DEPTH 8
DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
/* Use instant packet send by default. */