Merge tag 'rxrpc-rewrite-20160924' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Implement slow-start and other bits

This set of patches implements the RxRPC slow-start feature for AF_RXRPC to
improve performance and handling of occasional packet loss.  This is more or
less the same as TCP slow start [RFC 5681].  Firstly, there are some ACK
generation improvements:

 (1) Send ACKs regularly to apprise the peer of our state so that they can do
     congestion management of their own.

 (2) Send an ACK when we fill in a hole in the buffer so that the peer can
     find out that we did this thus forestalling retransmission.

 (3) Note the final DATA packet's serial number in the final ACK for
     correlation purposes.

and a couple of bug fixes:

 (4) Reinitialise the ACK state and clear the ACK and resend timers upon
     entering the client reply reception phase to kill off any pending probe
     ACKs.

 (5) Delay the resend timer to allow for nsec->jiffies conversion errors.

and then there's the slow-start pieces:

 (6) Summarise an ACK.

 (7) Schedule a PING or IDLE ACK if the reply to a client call is overdue to
     try and find out what happened to it.

 (8) Implement the slow start feature.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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