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Eric Dumazet 19f572565e fib_hash: RCU conversion phase 2 
Get rid of fib_hash_lock rwlock.

The fn_zone hash table resize is the noticeable part of this patch.

I added a seqlock per fn_zone, so that readers can restart their lookup
in the (very rare) case a writer expanded the hash table.

Add rcu heads in fib_alias and fib_node, use call_rcu() to defer their
freeing, and use appropriate _rcu list manipulations.

Stress test (160.000.000 udp frames sent, IP route cache disabled to
mimic DDOS attack, FIB_HASH)

Before:
real	0m41.191s
user	0m13.137s
sys	8m55.241s

After:
real	0m38.091s
user	0m13.189s
sys	7m53.018s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17 13:53:16 -07:00
..
netfilter
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-09-27 01:03:03 -07:00
af_inet.c
net: build_ehash_secret() and rt_bind_peer() cleanups
2010-08-20 00:50:16 -07:00
ah4.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
arp.c
neigh: Protect neigh->ha[] with a seqlock
2010-10-11 12:54:04 -07:00
cipso_ipv4.c
net: Remove unnecessary returns from void function()s
2010-05-17 23:23:14 -07:00
datagram.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
devinet.c
ipv4: ip_ptr cleanups
2010-09-15 22:06:05 -07:00
esp4.c
xfrm: SA lookups signature with mark
2010-02-22 16:20:22 -08:00
fib_frontend.c
fib: avoid false sharing on fib_table_hash
2010-10-16 11:13:23 -07:00
fib_hash.c
fib_hash: RCU conversion phase 2
2010-10-17 13:53:16 -07:00
fib_lookup.h
fib_hash: RCU conversion phase 2
2010-10-17 13:53:16 -07:00
fib_rules.c
fib: RCU conversion of fib_lookup()
2010-10-05 20:39:38 -07:00
fib_semantics.c
fib: RCU conversion of fib_lookup()
2010-10-05 20:39:38 -07:00
fib_trie.c
fib_trie: use fls() instead of open coded loop
2010-10-16 11:13:22 -07:00
gre.c
gre: protocol table can be static
2010-10-03 21:50:51 -07:00
icmp.c
net: simplify flags for tx timestamping
2010-08-19 00:08:30 -07:00
igmp.c
bonding: fix to rejoin multicast groups immediately
2010-10-05 20:26:57 -07:00
inet_connection_sock.c
net/ipv4: EXPORT_SYMBOL cleanups
2010-07-12 12:57:54 -07:00
inet_diag.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
inet_fragment.c
net/ipv4: EXPORT_SYMBOL cleanups
2010-07-12 12:57:54 -07:00
inet_hashtables.c
net/ipv4: EXPORT_SYMBOL cleanups
2010-07-12 12:57:54 -07:00
inet_lro.c
net/ipv4: Move && and || to end of previous line
2009-11-23 10:41:23 -08:00
inet_timewait_sock.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
inetpeer.c
inetpeer: restore small inet_peer structures
2010-06-16 11:55:39 -07:00
ip_forward.c
net-next: remove useless union keyword
2010-06-10 23:31:35 -07:00
ip_fragment.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
ip_gre.c
net: add a core netdev->rx_dropped counter
2010-10-05 14:47:55 -07:00
ip_input.c
net: use this_cpu_ptr()
2010-06-28 23:24:29 -07:00
ip_options.c
bridge : Sanitize skb before it enters the IP stack
2010-09-19 12:42:34 -07:00
ip_output.c
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-09-27 01:03:03 -07:00
ip_sockglue.c
ipv4: enable getsockopt() for IP_NODEFRAG
2010-09-13 19:57:23 -07:00
ipcomp.c
xfrm: SA lookups signature with mark
2010-02-22 16:20:22 -08:00
ipconfig.c
ipconfig: send host-name in DHCP requests
2010-06-02 07:05:03 -07:00
ipip.c
net: add a core netdev->rx_dropped counter
2010-10-05 14:47:55 -07:00
ipmr.c
ipmr: cleanups
2010-10-03 21:50:53 -07:00
Kconfig
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-10-04 11:56:38 -07:00
Makefile
PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol)
2010-08-21 23:05:39 -07:00
netfilter.c
Merge branch 'master' of /repos/git/net-next-2.6
2010-06-15 17:31:06 +02:00
proc.c
snmp: 64bit ipstats_mib for all arches
2010-06-30 13:31:19 -07:00
protocol.c
net: inet_add_protocol() can use cmpxchg()
2010-09-08 21:31:35 -07:00
raw.c
net: simplify flags for tx timestamping
2010-08-19 00:08:30 -07:00
route.c
net dst: use a percpu_counter to track entries
2010-10-11 13:06:53 -07:00
syncookies.c
syncookies: add support for ECN
2010-06-26 22:00:03 -07:00
sysctl_net_ipv4.c
net: reserve ports for applications using fixed port numbers
2010-05-15 23:28:40 -07:00
tcp_bic.c
tcp: add helper for AI algorithm
2009-03-02 03:00:15 -08:00
tcp_cong.c
net/ipv4: Eliminate kstrdup memory leak
2010-08-27 19:31:56 -07:00
tcp_cubic.c
tcp: add helper for AI algorithm
2009-03-02 03:00:15 -08:00
tcp_diag.c
tcp: diag: Dont report negative values for rx queue
2009-12-03 16:06:13 -08:00
tcp_highspeed.c
[TCP]: Cong.ctrl modules: remove unused good_ack from cong_avoid
2008-01-28 14:55:41 -08:00
tcp_htcp.c
net/ipv4: Move && and || to end of previous line
2009-11-23 10:41:23 -08:00
tcp_hybla.c
TCP: tcp_hybla: Fix integer overflow in slow start increment
2010-06-02 07:15:48 -07:00
tcp_illinois.c
[TCP]: Cong.ctrl modules: remove unused good_ack from cong_avoid
2008-01-28 14:55:41 -08:00
tcp_input.c
tcp: sack lost marking fixes
2010-10-17 13:46:33 -07:00
tcp_ipv4.c
gro: unexport tcp4_gro_receive and tcp4_gro_complete
2010-08-31 13:37:07 -07:00
tcp_lp.c
net/ipv4: Move && and || to end of previous line
2009-11-23 10:41:23 -08:00
tcp_minisocks.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
tcp_output.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
tcp_probe.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
tcp_scalable.c
tcp: add helper for AI algorithm
2009-03-02 03:00:15 -08:00
tcp_timer.c
tcp: use correct counters in CA_CWR state too
2010-10-17 13:46:33 -07:00
tcp_vegas.c
tcp: tcp_vegas ssthresh bugfix
2009-05-25 22:44:59 -07:00
tcp_vegas.h
[TCP]: congestion control API pass RTT in microseconds
2007-07-31 02:27:57 -07:00
tcp_veno.c
net/ipv4: Move && and || to end of previous line
2009-11-23 10:41:23 -08:00
tcp_westwood.c
net: return operator cleanup
2010-09-23 14:33:39 -07:00
tcp_yeah.c
net/ipv4: Move && and || to end of previous line
2009-11-23 10:41:23 -08:00
tcp.c
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-10-04 11:56:38 -07:00
tunnel4.c
tunnels: missing rcu_assign_pointer()
2010-09-09 15:02:39 -07:00
udp_impl.h
net: Make setsockopt() optlen be unsigned.
2009-09-30 16:12:20 -07:00
udp.c
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-09-09 22:27:33 -07:00
udplite.c
net/ipv4: EXPORT_SYMBOL cleanups
2010-07-12 12:57:54 -07:00
xfrm4_input.c
net/ipv4: EXPORT_SYMBOL cleanups
2010-07-12 12:57:54 -07:00
xfrm4_mode_beet.c
ipsec: Interfamily IPSec BEET
2008-08-06 02:39:30 -07:00
xfrm4_mode_transport.c
[IPSEC]: Use IPv6 calling convention as the convention for x->mode->output
2007-10-10 16:55:54 -07:00
xfrm4_mode_tunnel.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
xfrm4_output.c
netfilter: ipv4: use NFPROTO values for NF_HOOK invocation
2010-03-25 16:00:30 +01:00
xfrm4_policy.c
net dst: use a percpu_counter to track entries
2010-10-11 13:06:53 -07:00
xfrm4_state.c
xfrm: Allow different selector family in temporary state
2010-09-20 11:11:38 -07:00
xfrm4_tunnel.c
net: struct xfrm_tunnel in read_mostly section
2010-08-30 13:50:45 -07:00