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Eric Dumazet 70da268b56 net: SO_INCOMING_CPU setsockopt() support 
SO_INCOMING_CPU as added in commit 2c8c56e15d was a getsockopt() command
to fetch incoming cpu handling a particular TCP flow after accept()

This commits adds setsockopt() support and extends SO_REUSEPORT selection
logic : If a TCP listener or UDP socket has this option set, a packet is
delivered to this socket only if CPU handling the packet matches the specified
one.

This allows to build very efficient TCP servers, using one listener per
RX queue, as the associated TCP listener should only accept flows handled
in softirq by the same cpu.
This provides optimal NUMA behavior and keep cpu caches hot.

Note that __inet_lookup_listener() still has to iterate over the list of
all listeners. Following patch puts sk_refcnt in a different cache line
to let this iteration hit only shared and read mostly cache lines.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-12 19:28:20 -07:00
..
6lowpan 6lowpan: move shared settings to lowpan_netdev_setup 2015-10-08 14:25:34 +02:00
9p net/9p: Remove ib_get_dma_mr calls 2015-08-30 18:12:36 -04:00
802
8021q net: 8021q: convert to using IFF_NO_QUEUE 2015-08-18 11:55:06 -07:00
appletalk net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
atm atm: deal with setting entry before mkip was called 2015-09-17 22:13:32 -07:00
ax25 NET: AX.25: Stop heartbeat timer on disconnect. 2015-07-15 15:59:58 -07:00
batman-adv batman-adv: turn batadv_neigh_node_get() into local function 2015-08-27 20:15:34 +02:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2015-10-11 05:15:30 -07:00
bridge bridge: push bridge setting ageing_time down to switchdev 2015-10-12 05:20:20 -07:00
caif net: caif: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
can can: replace timestamp as unique skb attribute 2015-07-12 21:13:22 +02:00
ceph libceph: don't access invalid memory in keepalive2 path 2015-09-17 20:14:15 +03:00
core net: SO_INCOMING_CPU setsockopt() support 2015-10-12 19:28:20 -07:00
dcb net/dcb: make dcbnl.c explicitly non-modular 2015-10-09 07:52:27 -07:00
dccp net/dccp: dccp_bad_service_code can be boolean 2015-10-09 07:49:03 -07:00
decnet dst: Pass net into dst->output 2015-10-08 04:27:03 -07:00
dns_resolver
dsa net: dsa: use switchdev obj in port_fdb_del 2015-10-11 05:28:52 -07:00
ethernet net: help compiler generate better code in eth_get_headlen 2015-09-28 22:51:15 -07:00
hsr net: hsr: convert to using IFF_NO_QUEUE 2015-08-18 11:55:07 -07:00
ieee802154 6lowpan: move shared settings to lowpan_netdev_setup 2015-10-08 14:25:34 +02:00
ipv4 net: SO_INCOMING_CPU setsockopt() support 2015-10-12 19:28:20 -07:00
ipv6 net: SO_INCOMING_CPU setsockopt() support 2015-10-12 19:28:20 -07:00
ipx net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
irda irda: use msecs_to_jiffies for conversion to jiffies 2015-05-25 17:46:21 -04:00
iucv s390/iucv: do not use arrays as argument 2015-09-21 16:03:04 -07:00
key net: Fix RCU splat in af_key 2015-08-24 14:48:10 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-02 07:21:25 -07:00
l3mdev net: Add netif_is_l3_slave 2015-10-07 04:27:43 -07:00
lapb
llc tcp: fix recv with flags MSG_WAITALL | MSG_PEEK 2015-07-27 01:06:53 -07:00
mac80211 For the current cycle, we have the following right now: 2015-10-07 04:29:18 -07:00
mac802154 ieee802154: change mtu size behaviour 2015-09-30 13:21:32 +02:00
mpls dst: Pass net into dst->output 2015-10-08 04:27:03 -07:00
netfilter net/nfnetlink: lockdep_nfnl_is_held can be boolean 2015-10-09 07:49:00 -07:00
netlabel netlink: implement nla_put_in_addr and nla_put_in6_addr 2015-03-31 13:58:35 -04:00
netlink net/netlink: lockdep_genl_is_held can be boolean 2015-10-09 07:48:59 -07:00
netrom netfilter: Remove spurios included of netfilter.h 2015-06-18 21:14:32 +02:00
nfc nfc: netlink: Add capability to reply to vendor_cmd with data 2015-08-20 22:00:11 +02:00
openvswitch openvswitch: netlink attributes for IPv6 tunneling 2015-10-07 04:18:00 -07:00
packet packet: support per-packet fwmark for af_packet sendmsg 2015-10-12 19:25:22 -07:00
phonet net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
rds Merge branch 'net/rds/4.3-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux 2015-10-08 04:38:37 -07:00
rfkill rfkill: Copy "all" global state to other types 2015-09-04 14:26:56 +02:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-06-24 02:58:51 -07:00
rxrpc rxrpc: Replace get_seconds with ktime_get_seconds 2015-09-20 21:53:56 -07:00
sched net: synack packets can be attached to request sockets 2015-10-11 05:05:06 -07:00
sctp net: sctp: avoid incorrect time_t use 2015-10-05 03:16:48 -07:00
sunrpc Changes for 4.3-rc4 2015-10-01 16:38:52 -04:00
switchdev switchdev: skip over ports returning -EOPNOTSUPP when recursing ports 2015-10-12 05:20:20 -07:00
tipc tipc: reinitialize pointer after skb linearize 2015-09-20 22:31:20 -07:00
unix af_unix: return data from multiple SKBs on recv() with MSG_PEEK flag 2015-09-29 13:47:08 -07:00
vmw_vsock net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
wimax net:wimax: Fix doucble word "the the" in networking.xml 2015-08-09 22:43:52 -07:00
wireless For the current cycle, we have the following right now: 2015-10-07 04:29:18 -07:00
x25 net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
xfrm dst: Pass net into dst->output 2015-10-08 04:27:03 -07:00
compat.c net: switch importing msghdr from userland to {compat_,}import_iovec() 2015-04-09 00:02:26 -04:00
Kconfig net: Introduce L3 Master device abstraction 2015-09-29 20:40:32 -07:00
Makefile net: Introduce L3 Master device abstraction 2015-09-29 20:40:32 -07:00
socket.c net: Add a struct net parameter to sock_create_kern 2015-05-11 10:50:17 -04:00
sysctl_net.c