Wei Wang 7d9e5f4221 ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF ... For tx path, in most cases, we still have to take refcnt on the dst cause the caller is caching the dst somewhere. But it still is beneficial to make use of RT6_LOOKUP_F_DST_NOREF flag while doing the route lookup. It is cause this flag prevents manipulating refcnt on net->ipv6.ip6_null_entry when doing fib6_rule_lookup() to traverse each routing table. The null_entry is a shared object and constant updates on it cause false sharing. We converted the current major lookup function ip6_route_output_flags() to make use of RT6_LOOKUP_F_DST_NOREF. Together with the change in the rx path, we see noticable performance boost: I ran synflood tests between 2 hosts under the same switch. Both hosts have 20G mlx NIC, and 8 tx/rx queues. Sender sends pure SYN flood with random src IPs and ports using trafgen. Receiver has a simple TCP listener on the target port. Both hosts have multiple custom rules: - For incoming packets, only local table is traversed. - For outgoing packets, 3 tables are traversed to find the route. The packet processing rate on the receiver is as follows: - Before the fix: 3.78Mpps - After the fix: 5.50Mpps Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-06-23 13:24:17 -07:00
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6lowpan	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
9p	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188	2019-05-30 11:29:21 -07:00
802	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
8021q	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
appletalk	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372	2019-06-05 17:37:10 +02:00
atm	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
ax25	ax25: fix inconsistent lock state in ax25_destroy_timer	2019-06-16 14:22:37 -07:00
batman-adv	This feature/cleanup patchset includes the following patches:	2019-05-09 09:44:17 -07:00
bluetooth	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
bpf	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
bpfilter	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
bridge	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
caif	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194	2019-05-30 11:29:22 -07:00
can	can: purge socket error queue on sock destruct	2019-06-07 23:03:54 +02:00
ceph	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268	2019-06-05 17:30:29 +02:00
core	netns: restore ops before calling ops_exit_list	2019-06-22 16:55:36 -07:00
dcb	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201	2019-05-30 11:29:52 -07:00
dccp	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
decnet	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 53	2019-05-24 17:36:42 +02:00
dns_resolver	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
dsa	net: dsa: use switchdev handle helpers	2019-06-14 20:20:07 -07:00
ethernet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-07 11:00:14 -07:00
hsr	hsr: fix don't prune the master node from the node_db	2019-05-23 09:29:44 -07:00
ieee802154	inet: fix various use-after-free in defrags units	2019-06-19 11:37:47 -04:00
ife	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
ipv4	net: fastopen: robustness and endianness fixes for SipHash	2019-06-22 16:30:37 -07:00
ipv6	ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF	2019-06-23 13:24:17 -07:00
iucv	net/af_iucv: always register net_device notifier	2019-06-19 16:26:33 -04:00
kcm	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
key	af_key: make use of BUG_ON macro	2019-06-09 19:56:42 -07:00
l2tp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
l3mdev	ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF	2019-06-23 13:24:17 -07:00
lapb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
llc	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 281	2019-06-05 17:36:36 +02:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
mac802154	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
mpls	mpls: fix af_mpls dependencies for real	2019-06-12 09:42:34 -07:00
ncsi	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
netlabel	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13	2019-05-21 11:28:45 +02:00
netlink	net: remove empty netlink_tap_exit_net	2019-06-14 19:50:33 -07:00
netrom	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
nfc	SPDX update for 5.2-rc6	2019-06-21 09:58:42 -07:00
nsh	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
openvswitch	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
packet	net/packet: introduce packet_rcv_try_clear_pressure() helper	2019-06-14 18:52:14 -07:00
phonet	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336	2019-06-05 17:37:07 +02:00
psample	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
qrtr	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284	2019-06-05 17:36:37 +02:00
rds	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-07 11:00:14 -07:00
rfkill	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
rose	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
rxrpc	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
sched	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
smc	net: use new in_dev_ifa iterators	2019-06-02 18:06:26 -07:00
strparser	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
sunrpc	SUNRPC: Fix a credential refcount leak	2019-06-21 14:45:09 -04:00
switchdev	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
tipc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
tls	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-07 11:00:14 -07:00
vmw_vsock	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
wimax	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268	2019-06-05 17:30:29 +02:00
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-22 08:59:24 -04:00
x25	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
xdp	xdp: check device pointer before clearing	2019-06-12 16:41:47 +02:00
xfrm	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335	2019-06-05 17:37:06 +02:00
compat.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
Kconfig	net: ipv4: move tcp_fastopen server side code to SipHash library	2019-06-17 13:56:26 -07:00
Makefile	net: split out functions related to registering inflight socket files	2019-02-28 08:24:23 -07:00
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-07 11:00:14 -07:00
sysctl_net.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00