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-----BEGIN PGP SIGNATURE----- iQIVAwUAV+OQV/Sw1s6N8H32AQK/Gw//TF7n19v+gqUenh5m6xPYkVlZl6d/TRi+ 3JoG5pdNORxTDU7UgzkeuCywDTk5XUYsJs3TOzInRAdDedwfgIiwF3ZKw3Bo30vR cVUfG7GK4o+CLWifL3BILYMTJfkOnUS4sllylSqX/EOlPDEEspSRWTxXq+DCOGNZ 1APBRD8XfA+IIC3fleMh+zSpKZ3ffc2c7djelzo2nCG3ku78U57B23TCyzp2tQNQ 6ClvhOAwL2nMXF5vebtIU7ou6LUV/TdC4qTkQuz3du/+k+LOG/c8/6s6k70MgXQU L3DW3rcnrWxkyzDb5oQoGYSWG5x4gp/TazHbJE2kuUVhQma8eDbOAGRWJoxlSzoC LqHE+6q3KnwwXpbYd3DJ+jUI7pu7pUvub1cvJr0uxPcjRb4CzhHT/1OBUb9p4CJX /n8NFNXk+5qWsvLaPuNNBPs4pc2xgz/cotjKBYUznqObiq2xgeivZpbsEBOpSIT1 2hl0EuyAi1Gwpi6qfW8oM6EGrlAzuG77cLcLnxrDz+GsHcgqUvdSuTh0P26eOh7D 1V03kkfX9dIqkOc5xA9xAckopfG5BhQDiFsMV+5McZ2x8GtUdnMw8E7dsG8xIeY5 yDzk9m6tD79PlqS7HJ7Fzj6owzqLUeJOI08y9EUSacBFKzNak1NVmcYcXd10rDFj duNM4rDi6zA= =3zfm -----END PGP SIGNATURE----- Merge tag 'rxrpc-rewrite-20160922-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs David Howells says: ==================== rxrpc: Preparation for slow-start algorithm [ver #2] Here are some patches that prepare for improvements in ACK generation and for the implementation of the slow-start part of the protocol: (1) Stop storing the protocol header in the Tx socket buffers, but rather generate it on the fly. This potentially saves a little space and makes it easier to alter the header just before transmission (the flags may get altered and the serial number has to be changed). (2) Mask off the Tx buffer annotations and add a flag to record which ones have already been resent. (3) Track RTT on a per-peer basis for use in future changes. Tracepoints are added to log this. (4) Send PING ACKs in response to incoming calls to elicit a PING-RESPONSE ACK from which RTT data can be calculated. The response also carries other useful information. (5) Expedite PING-RESPONSE ACK generation from sendmsg. If we're actively using sendmsg, this allows us, under some circumstances, to avoid having to rely on the background work item to run to generate this ACK. This requires ktime_sub_ms() to be added. (6) Set the REQUEST-ACK flag on some DATA packets to elicit ACK-REQUESTED ACKs from which RTT data can be calculated. (7) Limit the use of pings and ACK requests for RTT determination. Changes: (V2) Don't use the C division operator for 64-bit division. One instance should use do_div() and the other should be using nsecs_to_jiffies(). The last two patches got transposed, leading to an undefined symbol in one of them. Reported-by: kbuild test robot <lkp@intel.com> ==================== Signed-off-by: David S. Miller <davem@davemloft.net>