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mptcp: better window sharing

Paolo Abeni requested to merge pabeni/centos-stream-9:mptcp_2sf into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2089885 Tested: LNST, Tier1 and vs bz reproducer

when the MPTCP tput is CPU bound, and the used links are much faster then the CPU limits, the MPTCP tput is unstable as the MPTCP-level congestion window sharing has currently some glitches: patch 1/5 ensures the sharing affects even the announced window, patch 3/5 and 4/5 takes care of concurrent announced window updates. The remaining patches add more MIBs counter for introspection's sake

Signed-off-by: Paolo Abeni pabeni@redhat.com

Edited by Paolo Abeni

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