Merge branch 'tcp-readd-hp'

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Florian Westphal says:

====================
tcp: re-add header prediction

Eric reported a performance regression caused by header prediction
removal.

We now call tcp_ack() much more frequently, for some workloads
this brings in enough cache line misses to become noticeable.

We could possibly still kill HP provided we find a different
way to suppress unneeded tcp_ack, but given we're late in
the cycle it seems preferable to revert.
====================

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

...

This commit is contained in:

David S. Miller 2017-08-30 11:20:09 -07:00

parent 0da93d2ebb 31770e34e4

commit 2c667d40a6

9 changed files with 271 additions and 27 deletions

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6

include/linux/tcp.h

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28

include/net/tcp.h

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2

include/uapi/linux/snmp.h

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2

net/ipv4/proc.c

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4

net/ipv4/tcp.c

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223

net/ipv4/tcp_input.c

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2

net/ipv4/tcp_minisocks.c

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2

net/ipv4/tcp_output.c

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31

net/ipv4/tcp_westwood.c

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