linux/net/tipc
Jon Maloy 8d6e79d3ce tipc: improve link resiliency when rps is activated
Currently, the TIPC RPS dissector is based only on the incoming packets'
source node address, hence steering all traffic from a node to the same
core. We have seen that this makes the links vulnerable to starvation
and unnecessary resets when we turn down the link tolerance to very low
values.

To reduce the risk of this happening, we exempt probe and probe replies
packets from the convergence to one core per source node. Instead, we do
the opposite, - we try to diverge those packets across as many cores as
possible, by randomizing the flow selector key.

To make such packets identifiable to the dissector, we add a new
'is_keepalive' bit to word 0 of the LINK_PROTOCOL header. This bit is
set both for PROBE and PROBE_REPLY messages, and only for those.

It should be noted that these packets are not part of any flow anyway,
and only constitute a minuscule fraction of all packets sent across a
link. Hence, there is no risk that this will affect overall performance.

Acked-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>
2017-11-11 15:36:05 +09:00
..
addr.c tipc: simplify include dependencies 2015-05-14 12:24:45 -04:00
addr.h tipc: introduce constants for tipc address validation 2016-07-26 14:26:42 -07:00
bcast.c tipc: improve destination linked list 2017-10-13 08:46:00 -07:00
bcast.h tipc: make replicast a user selectable option 2017-01-20 12:10:17 -05:00
bearer.c tipc: remove unnecessary call to dev_net() 2017-09-06 21:25:52 -07:00
bearer.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
core.c netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00
core.h tipc: add ability to order and receive topology events in driver 2017-10-13 08:46:00 -07:00
discover.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
discover.h tipc: eliminate buffer leak in bearer layer 2016-04-07 17:00:13 -04:00
eth_media.c tipc: make media address offset a common define 2015-02-27 18:18:48 -05:00
group.c tipc: add multipoint-to-point flow control 2017-10-13 08:46:01 -07:00
group.h tipc: guarantee that group broadcast doesn't bypass group unicast 2017-10-13 08:46:01 -07:00
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: improve link resiliency when rps is activated 2017-11-11 15:36:05 +09:00
link.h tipc: transfer broadcast nacks in link state messages 2016-09-02 17:10:24 -07:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
monitor.c tipc: eliminate unnecessary probing 2017-11-03 15:48:46 +09:00
monitor.h tipc: dump monitor attributes 2016-07-26 14:26:42 -07:00
msg.c tipc: refactor function filter_rcv() 2017-10-13 08:46:00 -07:00
msg.h tipc: improve link resiliency when rps is activated 2017-11-11 15:36:05 +09:00
name_distr.c tipc: allocate user memory with GFP_KERNEL flag 2017-01-16 13:31:53 -05:00
name_distr.h tipc: reduce code dependency between binding table and node layer 2015-11-20 14:06:10 -05:00
name_table.c tipc: eliminate KASAN warning 2017-10-26 09:38:34 +09:00
name_table.h tipc: introduce group anycast messaging 2017-10-13 08:46:00 -07:00
net.c netlink: pass extended ACK struct where available 2017-04-13 13:58:22 -04:00
net.h tipc: add peer removal functionality 2016-08-18 23:36:07 -07:00
netlink_compat.c net: tipc: constify genl_ops 2017-08-23 22:31:38 -07:00
netlink.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
netlink.h tipc: make cluster size threshold for monitoring configurable 2016-07-26 14:26:42 -07:00
node.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
node.h tipc: introduce communication groups 2017-10-13 08:46:00 -07:00
server.c tipc: checking for NULL instead of IS_ERR() 2017-10-20 08:34:00 +01:00
server.h tipc: add ability to order and receive topology events in driver 2017-10-13 08:46:00 -07:00
socket.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
socket.h tipc: redesign connection-level flow control 2016-05-03 15:51:16 -04:00
subscr.c net: tipc: Convert timers to use timer_setup() 2017-11-01 12:38:45 +09:00
subscr.h tipc: adjust the policy of holding subscription kref 2017-03-28 18:03:33 -07:00
sysctl.c tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
udp_media.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
udp_media.h tipc: add UDP remoteip dump to netlink API 2016-08-26 21:38:41 -07:00