linux/net/tipc
Jon Paul Maloy d999297c3d tipc: reduce locking scope during packet reception
We convert packet/message reception according to the same principle
we have been using for message sending and timeout handling:

We move the function tipc_rcv() to node.c, hence handling the initial
packet reception at the link aggregation level. The function grabs
the node lock, selects the receiving link, and accesses it via a new
call tipc_link_rcv(). This function appends buffers to the input
queue for delivery upwards, but it may also append outgoing packets
to the xmit queue, just as we do during regular message sending. The
latter will happen when buffers are forwarded from the link backlog,
or when retransmission is requested.

Upon return of this function, and after having released the node lock,
tipc_rcv() delivers/tranmsits the contents of those queues, but it may
also perform actions such as link activation or reset, as indicated by
the return flags from the link.

This reduces the number of cpu cycles spent inside the node spinlock,
and reduces contention on that lock.

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>
2015-07-20 20:41:16 -07:00
..
addr.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
addr.h tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
bcast.c tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
bcast.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
bearer.c tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
bearer.h tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
core.c tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
core.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
discover.c tipc: move link creation from neighbor discoverer to node 2015-07-20 20:41:14 -07:00
discover.h tipc: involve namespace infrastructure 2015-01-12 16:24:32 -05:00
eth_media.c tipc: make media address offset a common define 2015-02-27 18:18:48 -05:00
ib_media.c tipc: rename media/msg related definitions 2015-02-27 18:18:48 -05:00
Kconfig tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
link.c tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
link.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
Makefile tipc: add ip/udp media type 2015-03-05 22:08:42 -05:00
msg.c tipc: add packet sequence number at instant of transmission 2015-05-14 12:24:46 -04:00
msg.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
name_distr.c tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
name_distr.h tipc: resolve race problem at unicast message reception 2015-02-05 16:00:02 -08:00
name_table.c tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
name_table.h tipc: convert legacy nl name table dump to nl compat 2015-02-09 13:20:48 -08:00
net.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
net.h tipc: make tipc node table aware of net namespace 2015-01-12 16:24:32 -05:00
netlink_compat.c tipc: send explicit not supported error in nl compat 2015-05-09 16:40:03 -04:00
netlink.c tipc: move and rename the legacy nl api to "nl compat" 2015-02-09 13:20:47 -08:00
netlink.h tipc: move and rename the legacy nl api to "nl compat" 2015-02-09 13:20:47 -08:00
node.c tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
node.h tipc: reduce locking scope during packet reception 2015-07-20 20:41:16 -07:00
server.c tipc: use sock_create_kern interface to create kernel socket 2015-05-14 13:39:33 -04:00
server.h tipc: make subscriber server support net namespace 2015-01-12 16:24:33 -05:00
socket.c tipc: make media xmit call outside node spinlock context 2015-07-20 20:41:15 -07:00
socket.h tipc: fix netns refcnt leak 2015-03-17 22:11:26 -04:00
subscr.c tipc: adjust locking policy of subscription 2015-05-04 15:04:01 -04:00
subscr.h tipc: rename functions defined in subscr.c 2015-05-04 15:04:00 -04:00
sysctl.c tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
udp_media.c udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb(). 2015-04-07 15:29:08 -04:00