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Jon Paul Maloy 2cdf3918e4 tipc: eliminate unnecessary call to broadcast ack function 
The unicast packet header contains a broadcast acknowledge sequence
number, that may need to be conveyed to the broadcast link for proper
treatment. Currently, the function tipc_rcv(), which is on the most
critical data path, calls the function tipc_bclink_acknowledge() to
have this done. This call is made for each received packet, and results
in the unconditional grabbing of the broadcast link spinlock.

This is unnecessary, since we can see directly from tipc_rcv() if
the acknowledged number differs from what has been previously acked
from the node in question. In the vast majority of cases the numbers
won't differ, and there is nothing to update.

We now make the call to tipc_bclink_acknowledge() conditional
to that the two ack values differ.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-14 14:38:32 -04:00
..
6lowpan 6lowpan: nhc: add other known rfc6282 compressions 2015-02-14 23:08:44 +01:00
9p net: Introduce possible_net_t 2015-03-12 14:39:40 -04:00
802 net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
8021q 8021q: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:37 -05:00
appletalk appletalk: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:37 -05:00
atm atm: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:37 -05:00
ax25 ax25: Fix the build when CONFIG_INET is disabled 2015-03-05 13:17:39 -05:00
batman-adv batman-adv: Fix use of seq_has_overflowed() 2015-02-22 17:00:08 -05:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2015-03-14 14:29:45 -04:00
bridge netfilter: bridge: use rcu hook to resolve br_netfilter dependency 2015-03-10 15:03:02 +01:00
caif Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-03 21:16:48 -05:00
can Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2015-02-19 14:14:42 -08:00
core inet: prepare sock_edemux() & sock_gen_put() for new SYN_RECV state 2015-03-12 22:58:13 -04:00
dcb net/dcb: Add IEEE QCN attribute 2015-03-06 21:50:02 -05:00
dccp inet: introduce ireq_family 2015-03-12 22:58:13 -04:00
decnet net: Remove protocol from struct dst_ops 2015-03-09 16:06:10 -04:00
dns_resolver
dsa net: dsa: fully divert PHY reads/writes if requested 2015-03-11 17:56:29 -04:00
ethernet ethernet: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:38 -05:00
hsr net/hsr: Fix NULL pointer dereference and refcnt bugs when deleting a HSR interface. 2015-03-01 13:40:23 -05:00
ieee802154 ieee802154: don't export static symbol 2015-03-14 17:11:31 +01:00
ipv4 tcp_metrics: Use a single hash table for all network namespaces. 2015-03-13 01:57:07 -04:00
ipv6 inet: introduce ireq_family 2015-03-12 22:58:13 -04:00
ipx net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
iucv net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
key net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
l2tp l2tp: Use eth_<foo>_addr instead of memset 2015-03-03 17:01:38 -05:00
lapb
llc net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-03 21:16:48 -05:00
mac802154 mac802154: correct max sifs size handling 2015-03-14 17:11:30 +01:00
mpls mpls: In mpls_egress verify the packet length. 2015-03-12 23:05:04 -04:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
netlabel Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2015-02-11 20:25:11 -08:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-03 21:16:48 -05:00
netrom net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
nfc net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
openvswitch net: Introduce possible_net_t 2015-03-12 14:39:40 -04:00
packet net: Introduce possible_net_t 2015-03-12 14:39:40 -04:00
phonet net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
rds net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
rfkill
rose net: Kill dev_rebuild_header 2015-03-02 16:43:41 -05:00
rxrpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-09 23:38:02 -04:00
sched cls_bpf: do eBPF invocation under non-bh RCU lock variant for maps 2015-03-12 18:33:15 -04:00
sctp net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
sunrpc sunrpc: fix braino in ->poll() 2015-03-08 12:53:46 -07:00
switchdev switchdev: correct spelling of notifier in comments 2015-03-11 23:06:39 -04:00
tipc tipc: eliminate unnecessary call to broadcast ack function 2015-03-14 14:38:32 -04:00
unix net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
vmw_vsock net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
wimax
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-03 21:16:48 -05:00
x25 net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
xfrm
compat.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-03-03 21:16:48 -05:00
Kconfig
Makefile mpls: Refactor how the mpls module is built 2015-03-04 00:26:06 -05:00
socket.c net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
sysctl_net.c