Merge branch 'tcp-policer-drops'

Yuchung Cheng says:

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tcp: reducing lost retransmits in recovery

This patch series reduces lost retransmits in recovery, in particular
when dealing with traffic policers. The main problem is that
slow start in recovery under policing can cause massive lost and
retransmit storms: any excess sending rate turns into drops. The
solution is to avoid doing slow start when lost retransmit is
detected and use packet conservation instead.

On networks with traffic policers the patches have lowered the
TCP loss rates by ~20% from Google servers without latency regressions.
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Signed-off-by: David S. Miller <davem@davemloft.net>