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[net-next,0/5] mptcp: re-enable sndbuf autotune

Message ID cover.1610991949.git.pabeni@redhat.com
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Series mptcp: re-enable sndbuf autotune | expand

Message

Paolo Abeni Jan. 20, 2021, 10:40 a.m. UTC 
The sendbuffer autotuning was unintentionally disabled as a
side effect of the recent workqueue removal refactor. These
patches re-enable id, with some extra care: with autotuning
enable/large send buffer we need a more accurate packet
scheduler to be able to use efficiently the available
subflow bandwidth, especially when the subflows have
different capacities.

The first patch cleans-up subflow socket handling, making
the actual re-enable (patch 2) simpler.

Patches 3 and 4 improve the packet scheduler, to better cope
with non trivial scenarios and large send buffer. 

Finally patch 5 adds and uses some infrastructure to avoid
the workqueue usage for the packet scheduler operations introduced
by the previous patches.

Paolo Abeni (5):
  mptcp: always graft subflow socket to parent
  mptcp: re-enable sndbuf autotune
  mptcp: do not queue excessive data on subflows
  mptcp: schedule work for better snd subflow selection
  mptcp: implement delegated actions

 net/mptcp/protocol.c | 176 ++++++++++++++++++++++++++++---------------
 net/mptcp/protocol.h |  72 ++++++++++++++++++
 net/mptcp/subflow.c  |  49 +++++++++++-
 3 files changed, 234 insertions(+), 63 deletions(-)