tcp: add low latency socket poll support.
authorEliezer Tamir <eliezer.tamir@linux.intel.com>
Mon, 10 Jun 2013 08:40:10 +0000 (11:40 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 11 Jun 2013 04:22:36 +0000 (21:22 -0700)
commitd30e383bb856f614ddb5bbbb5a7d3f86240e41ec
treecae914154ff4a50fcf9ac314a70b347e09f20efe
parenta5b50476f77a8fcc8055c955720d05a7c2d9c532
tcp: add low latency socket poll support.

Adds low latency socket poll support for TCP.
In tcp_v[46]_rcv() add a call to sk_mark_ll() to copy the napi_id
from the skb to the sk.
In tcp_recvmsg(), when there is no data in the socket we busy-poll.
This is a good example of how to add busy-poll support to more protocols.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Tested-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp.c
net/ipv4/tcp_ipv4.c
net/ipv6/tcp_ipv6.c