Patch "selftests: mptcp: decrease BW in simult flows" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    selftests: mptcp: decrease BW in simult flows

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     selftests-mptcp-decrease-bw-in-simult-flows.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 4932a188b9e196bd115dffbb465723c9f1effcb4
Author: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Date:   Wed Jan 31 22:49:51 2024 +0100

    selftests: mptcp: decrease BW in simult flows
    
    [ Upstream commit 5e2f3c65af47e527ccac54060cf909e3306652ff ]
    
    When running the simult_flow selftest in slow environments -- e.g. QEmu
    without KVM support --, the results can be unstable. This selftest
    checks if the aggregated bandwidth is (almost) fully used as expected.
    
    To help improving the stability while still keeping the same validation
    in place, the BW and the delay are reduced to lower the pressure on the
    CPU.
    
    Fixes: 1a418cb8e888 ("mptcp: simult flow self-tests")
    Fixes: 219d04992b68 ("mptcp: push pending frames when subflow has free space")
    Cc: stable@xxxxxxxxxxxxxxx
    Suggested-by: Paolo Abeni <pabeni@xxxxxxxxxx>
    Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240131-upstream-net-20240131-mptcp-ci-issues-v1-6-4c1c11e571ff@xxxxxxxxxx
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/testing/selftests/net/mptcp/simult_flows.sh b/tools/testing/selftests/net/mptcp/simult_flows.sh
index d41fcd9f4ba76..af5f4ae48f7ea 100755
--- a/tools/testing/selftests/net/mptcp/simult_flows.sh
+++ b/tools/testing/selftests/net/mptcp/simult_flows.sh
@@ -291,12 +291,12 @@ done
 
 setup
 run_test 10 10 0 0 "balanced bwidth"
-run_test 10 10 1 50 "balanced bwidth with unbalanced delay"
+run_test 10 10 1 25 "balanced bwidth with unbalanced delay"
 
 # we still need some additional infrastructure to pass the following test-cases
-run_test 30 10 0 0 "unbalanced bwidth"
-run_test 30 10 1 50 "unbalanced bwidth with unbalanced delay"
-run_test 30 10 50 1 "unbalanced bwidth with opposed, unbalanced delay"
+run_test 10 3 0 0 "unbalanced bwidth"
+run_test 10 3 1 25 "unbalanced bwidth with unbalanced delay"
+run_test 10 3 25 1 "unbalanced bwidth with opposed, unbalanced delay"
 
 mptcp_lib_result_print_all_tap
 exit $ret




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