[PATCH mptcp-next-next 0/3] mptcp: rx path refactor

[Paolo Abeni <pabeni@redhat.com>]

This is a batch of changes I had sitting in my local tree for a while.
Why another refactor you may ask? Two main resons:

- currently the mptcp RX path introduces quite a bit of 'exceptional'
 accounting/locking processing WRT to plain TCP, adding up to the
 implementation complexity in a misurable way
- the performance gap WRT plain TCP for single subflow connections is
 quite measurable.

The present refactor addresses both the above items: most of the
additional complexity is dropped, and single stream performances
increase measurably - from 55Gbps to 71Gbps in my loopback test. As a
reference, plain TCP is around 84Gps on the same host.

The above comes to a price: the patch are invasive, even in subtle ways:
the chance of destabilizing the implementation is real (ence the
additional, intentional '-next' into the subj).

In any case keeping the patch hidden for longer was not going to do any
good, so here we are.

Paolo Abeni (3):
  mptcp: consolidate subflow cleanup
  mptcp: move the whole rx path under msk socket lock protection
  mptcp: cleanup mem accounting.

 net/mptcp/fastopen.c |   4 +-
 net/mptcp/protocol.c | 202 +++++++++----------------------------------
 net/mptcp/protocol.h |   6 +-
 net/mptcp/subflow.c  |  33 +++----
 4 files changed, 66 insertions(+), 179 deletions(-)

-- 
2.45.2