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Eric Dumazet ea781f197d netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu() 
Use "hlist_nulls" infrastructure we added in 2.6.29 for RCUification of UDP & TCP.

This permits an easy conversion from call_rcu() based hash lists to a
SLAB_DESTROY_BY_RCU one.

Avoiding call_rcu() delay at nf_conn freeing time has numerous gains.

First, it doesnt fill RCU queues (up to 10000 elements per cpu).
This reduces OOM possibility, if queued elements are not taken into account
This reduces latency problems when RCU queue size hits hilimit and triggers
emergency mode.

- It allows fast reuse of just freed elements, permitting better use of
CPU cache.

- We delete rcu_head from "struct nf_conn", shrinking size of this structure
by 8 or 16 bytes.

This patch only takes care of "struct nf_conn".
call_rcu() is still used for less critical conntrack parts, that may
be converted later if necessary.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
 		2009-03-25 21:05:46 +01:00
..
9p 9p: fix endian issues [attempt 3] 2009-02-06 22:07:41 -08:00
802 net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
8021q gro: Optimise Ethernet header comparison 2009-02-08 20:22:18 -08:00
appletalk net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
atm lec: convert to net_device_ops 2009-01-21 14:02:00 -08:00
ax25 ax25: more common return path joining 2009-02-06 23:47:14 -08:00
bluetooth bluetooth: driver API update 2009-01-07 17:23:17 -08:00
bridge netfilter: ebtables: remove unneeded initializations 2009-02-18 16:30:38 +01:00
can ip: support for TX timestamps on UDP and RAW sockets 2009-02-15 22:43:38 -08:00
core net: pass new SIOCSHWTSTAMP through to device drivers 2009-02-15 22:43:38 -08:00
dcb DCB: fix kfree(skb) 2009-01-04 17:29:21 -08:00
dccp dccp: Debugging functions for feature negotiation 2009-01-21 14:34:05 -08:00
decnet net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
dsa net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
econet net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
ethernet eth: Declare an optimized compare_ether_addr_64bits() function 2008-11-23 23:24:32 -08:00
ipv4 netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu() 2009-03-25 21:05:46 +01:00
ipv6 netfilter: {ip,ip6,arp}_tables: fix incorrect loop detection 2009-03-25 19:26:35 +01:00
ipx net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
irda net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
iucv s390: remove s390_root_dev_*() 2009-01-06 10:44:34 -08:00
key af_key: initialize xfrm encap_oa 2009-01-25 20:49:14 -08:00
lapb
…
llc net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
mac80211 Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-02-14 23:12:00 -08:00
netfilter netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu() 2009-03-25 21:05:46 +01:00
netlabel netlabel: Update kernel configuration API 2008-12-31 12:54:11 -05:00
netlink netlink: add nla_policy_len() 2009-03-25 18:26:30 +01:00
netrom netrom: convert to net_device_ops 2009-01-21 14:02:02 -08:00
packet net: packet socket packet_lookup_frame fix 2009-02-01 01:53:29 -08:00
phonet Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-02-14 23:12:00 -08:00
rfkill net/rfkill/rfkill.c: fix unused rfkill_led_trigger() warning 2009-01-04 17:11:24 -08:00
rose rose: convert to network_device_ops 2009-01-21 14:02:04 -08:00
rxrpc RxRPC: Fix a potential NULL dereference 2009-02-06 21:50:52 -08:00
sched pkt_sched: sch_multiq: Change errno on non-multiqueue devices use. 2009-02-10 00:11:21 -08:00
sctp sctp: Inherit all socket options from parent correctly. 2009-02-16 00:03:11 -08:00
sunrpc net/sunrpc/xprtsock.c: some common code found 2009-02-06 23:48:33 -08:00
tipc net/tipc/bcast.h: use ARRAY_SIZE 2009-01-11 00:06:33 -08:00
unix introduce new LSM hooks where vfsmount is available. 2008-12-31 18:07:37 -05:00
wanrouter netdevice wanrouter: Convert directly reference of netdev->priv 2008-11-20 04:26:21 -08:00
wimax Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-02-14 23:12:00 -08:00
wireless cfg80211: add more flexible BSS lookup 2009-02-13 13:45:56 -05:00
x25 net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
xfrm Revert "xfrm: For 32/64 compatability wrt. xfrm_usersa_info" 2009-01-20 09:49:51 -08:00
Kconfig Phonet: move to Networking options like other protocol stacks 2009-01-26 21:03:33 -08:00
Makefile wimax: Makefile, Kconfig and docbook linkage for the stack 2009-01-07 10:00:17 -08:00
TUNABLE
…
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
nonet.c
…
socket.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00