android_kernel_xiaomi_sm8350/net/ipv6
Stephen Hemminger 784544739a netfilter: iptables: lock free counters
The reader/writer lock in ip_tables is acquired in the critical path of
processing packets and is one of the reasons just loading iptables can cause
a 20% performance loss. The rwlock serves two functions:

1) it prevents changes to table state (xt_replace) while table is in use.
   This is now handled by doing rcu on the xt_table. When table is
   replaced, the new table(s) are put in and the old one table(s) are freed
   after RCU period.

2) it provides synchronization when accesing the counter values.
   This is now handled by swapping in new table_info entries for each cpu
   then summing the old values, and putting the result back onto one
   cpu.  On a busy system it may cause sampling to occur at different
   times on each cpu, but no packet/byte counts are lost in the process.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>

Sucessfully tested on my dual quad core machine too, but iptables only (no ipv6 here)
BTW, my new "tbench 8" result is 2450 MB/s, (it was 2150 MB/s not so long ago)

Acked-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2009-02-20 10:35:32 +01:00
..
netfilter netfilter: iptables: lock free counters 2009-02-20 10:35:32 +01:00
addrconf_core.c
addrconf.c ipv6/addrconf: common code located 2009-02-06 23:48:01 -08:00
addrlabel.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
af_inet6.c net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
ah6.c netns xfrm: AH/ESP in netns! 2008-11-25 17:59:27 -08:00
anycast.c net: replace %#p6 format specifier with %pi6 2008-10-29 12:50:24 -07:00
datagram.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
esp6.c netns xfrm: AH/ESP in netns! 2008-11-25 17:59:27 -08:00
exthdrs_core.c
exthdrs.c net: replace %p6 with %pI6 2008-10-29 12:52:50 -07:00
fib6_rules.c netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
icmp.c net: fix xfrm reverse flow lookup for icmp6 2009-01-27 22:30:19 -08:00
inet6_connection_sock.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
inet6_hashtables.c net: Convert TCP/DCCP listening hash tables to use RCU 2008-11-23 17:22:55 -08:00
ip6_fib.c ipv6: Fix fib6_dump_table walker leak 2009-01-13 22:17:51 -08:00
ip6_flowlabel.c ipv6: Disallow rediculious flowlabel option sizes. 2009-02-06 00:49:55 -08:00
ip6_input.c IPv6: Fix multicast routing bugs. 2009-01-27 22:39:59 -08:00
ip6_output.c ipv6: Copy cork options in ip6_append_data 2009-02-05 15:15:50 -08:00
ip6_tunnel.c IPv6: fix to set device name when new IPv6 over IPv6 tunnel device is created. 2009-02-09 15:01:19 -08:00
ip6mr.c ipv6: compile fix for ip6mr.c 2009-01-31 00:51:49 -08:00
ipcomp6.c netns xfrm: state lookup in netns 2008-11-25 17:30:50 -08:00
ipv6_sockglue.c ipv6: IPV6_PKTINFO relied userspace providing correct length 2009-01-04 17:27:31 -08:00
Kconfig ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
Makefile
mcast.c ipv6/mcast: join error paths using goto 2008-12-14 23:15:21 -08:00
mip6.c netns xfrm: KM reporting in netns 2008-11-25 17:51:01 -08:00
ndisc.c ipv6/ndisc: join error paths 2009-02-06 23:47:37 -08:00
netfilter.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2008-11-28 02:19:15 -08:00
proc.c net: fix tiny output corruption of /proc/net/snmp6 2008-11-20 04:20:10 -08:00
protocol.c
raw.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
reassembly.c net: '&' redux 2008-11-03 18:21:05 -08:00
route.c net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
sit.c net: fix tunnels in netns after ndo_ changes 2008-11-23 17:26:26 -08:00
syncookies.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
sysctl_net_ipv6.c remove lots of double-semicolons 2009-01-08 08:31:14 -08:00
tcp_ipv6.c gro: Avoid copying headers of unmerged packets 2009-01-29 16:33:03 -08:00
tunnel6.c
udp_impl.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
udp.c ipv6: fix the outgoing interface selection order in udpv6_sendmsg() 2008-12-16 02:08:29 -08:00
udplite.c udp: RCU handling for Unicast packets. 2008-10-29 02:11:14 -07:00
xfrm6_input.c netns xfrm: per-netns MIBs 2008-11-25 17:59:52 -08:00
xfrm6_mode_beet.c ipsec: Interfamily IPSec BEET, ipv4-inner ipv6-outer 2008-08-06 02:40:25 -07:00
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c
xfrm6_policy.c net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
xfrm6_state.c xfrm: remove useless forward declarations 2008-11-25 01:05:54 -08:00
xfrm6_tunnel.c xfrm6_tunnel: join error paths using goto 2008-12-14 23:13:48 -08:00