I commented the three remaining failures when running tc with the
system-traffic tests. In addition I ran the following test to verify
we did not see any failures with recheck enabled:

  for i in {1..50}; do make check-offloads || \
    make check-offloads TESTSUITEFLAGS="--recheck" || break; \
    echo "ALL_50_OK: $i"; done;

Unfortunately, a bunch of test cases showed occasional failures.
For now, they are excluded from the test cases and need further
investigation. They are:

  datapath - truncate and output to gre tunnel
  datapath - truncate and output to gre tunnel by simulated packets

These tests where executed on a Fedora37 machine with the kernel
6.1.5-200.fc37.x86_64 installed.

Signed-off-by: Eelco Chaudron <echau...@redhat.com>
Acked-by: Roi Dayan <r...@nvidia.com>
---
 tests/system-offloads-testsuite-macros.at |   21 +++++++++++++++++++++
 tests/system-traffic.at                   |    2 ++
 2 files changed, 23 insertions(+)

diff --git a/tests/system-offloads-testsuite-macros.at 
b/tests/system-offloads-testsuite-macros.at
index 322166b8c..e50dc07fb 100644
--- a/tests/system-offloads-testsuite-macros.at
+++ b/tests/system-offloads-testsuite-macros.at
@@ -30,6 +30,27 @@ m4_define([OVS_TRAFFIC_VSWITCHD_START],
 ])
 
 # Macro to exclude tests that will fail with TC offload enabled.
+# We currently have the below tests disabled in system-traffic.at
+# for the following reasons:
+#
+#  TC does not support moving ports to a different namespace than vswitchd's
+#  namespace, so we need to disable this test.
+#    - 'conntrack - multiple namespaces, internal ports'
+#
+#  The kernel's tcf_ct_act() function does not seem to take care of any (QinQ)
+#  VLAN headers causing commits to fail. However, if this is solved, we have to
+#  make sure conntrack does not break the VLAN boundary, i.e., putting together
+#  two packets with different CVLAN+SVLAN values.
+#    - 'conntrack - IPv4 fragmentation + cvlan'
+#
+#  Fragmentation handling in ct zone 9 does not seem to work correctly.
+#  When moving this test over to the default zone all works fine.
+#    - 'conntrack - Fragmentation over vxlan'
+#
+#  Occasionally we fail with invalid byte counts.
+#    - 'datapath - truncate and output to gre tunnel by simulated packets'
+#    - 'datapath - truncate and output to gre tunnel'
+#
 m4_define([CHECK_NO_TC_OFFLOAD],
 [
      AT_SKIP_IF([:])
diff --git a/tests/system-traffic.at b/tests/system-traffic.at
index ba95c2614..c61be644f 100644
--- a/tests/system-traffic.at
+++ b/tests/system-traffic.at
@@ -1639,6 +1639,7 @@ dnl   ns0: connect to br-underlay, with IP: 10.1.1.1
 AT_SETUP([datapath - truncate and output to gre tunnel by simulated packets])
 OVS_CHECK_MIN_KERNEL(3, 10)
 AT_SKIP_IF([test $HAVE_NC = no])
+CHECK_NO_TC_OFFLOAD()
 OVS_TRAFFIC_VSWITCHD_START()
 
 ADD_BR([br-underlay], [set bridge br-underlay 
other-config:hwaddr=\"02:90:8c:a8:a1:49\"])
@@ -1770,6 +1771,7 @@ AT_SETUP([datapath - truncate and output to gre tunnel])
 AT_SKIP_IF([test $HAVE_NC = no])
 OVS_CHECK_KERNEL_EXCL(3, 10, 4, 15)
 OVS_CHECK_GRE()
+CHECK_NO_TC_OFFLOAD()
 OVS_TRAFFIC_VSWITCHD_START()
 
 ADD_BR([br-underlay])

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