q3k
/
linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux/net/ipv4/netfilter
History
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
..
Kconfig netfilter: Kconfig spelling fixes (trivial) 2009-03-16 15:17:23 +01:00
Makefile netfilter: Combine ipt_ttl and ip6t_hl source 2009-02-18 18:39:31 +01:00
arp_tables.c netfilter: {ip,ip6,arp}_tables: fix incorrect loop detection 2009-03-25 19:26:35 +01:00
arpt_mangle.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
arptable_filter.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
ip_queue.c netfilter: auto-load ip_queue module when socket opened 2009-03-16 15:31:10 +01:00
ip_tables.c netfilter: {ip,ip6,arp}_tables: fix incorrect loop detection 2009-03-25 19:26:35 +01:00
ipt_CLUSTERIP.c net: replace NIPQUAD() in net/ipv4/netfilter/ 2008-10-31 00:53:08 -07:00
ipt_ECN.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
ipt_LOG.c netfilter: use a linked list of loggers 2009-03-16 14:54:21 +01:00
ipt_MASQUERADE.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
ipt_NETMAP.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
ipt_REDIRECT.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
ipt_REJECT.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
ipt_ULOG.c netfilter: use a linked list of loggers 2009-03-16 14:54:21 +01:00
ipt_addrtype.c netfilter: netns-aware ipt_addrtype 2008-11-04 14:21:48 +01:00
ipt_ah.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
ipt_ecn.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
iptable_filter.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
iptable_mangle.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
iptable_raw.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
iptable_security.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
nf_conntrack_l3proto_ipv4.c netfilter: conntrack: increase drop stats if sequence adjustment fails 2009-03-16 15:18:50 +01:00
nf_conntrack_l3proto_ipv4_compat.c netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu() 2009-03-25 21:05:46 +01:00
nf_conntrack_proto_icmp.c netfilter 06/09: nf_conntrack: fix ICMP/ICMPv6 timeout sysctls on big-endian 2009-01-12 21:18:35 -08:00
nf_defrag_ipv4.c netfilter: restore lost #ifdef guarding defrag exception 2008-10-14 11:56:59 -07:00
nf_nat_amanda.c [NETFILTER]: remove unneeded rcu_dereference() calls 2007-11-07 04:08:23 -08:00
nf_nat_core.c netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu() 2009-03-25 21:05:46 +01:00
nf_nat_ftp.c [NETFILTER]: remove unneeded rcu_dereference() calls 2007-11-07 04:08:23 -08:00
nf_nat_h323.c net: replace NIPQUAD() in net/ipv4/netfilter/ 2008-10-31 00:53:08 -07:00
nf_nat_helper.c netfilter: netns nf_conntrack: pass conntrack to nf_conntrack_event_cache() not skb 2008-10-08 11:35:07 +02:00
nf_nat_irc.c net: replace NIPQUAD() in net/ipv4/netfilter/ 2008-10-31 00:53:08 -07:00
nf_nat_pptp.c netfilter: netns nat: PPTP NAT in netns 2008-10-08 11:35:11 +02:00
nf_nat_proto_common.c nf_nat: use secure_ipv4_port_ephemeral() for NAT port randomization 2008-08-18 21:32:32 -07:00
nf_nat_proto_dccp.c [NETFILTER]: nf_conntrack: const annotations in nf_conntrack_sctp, nf_nat_proto_gre 2008-04-14 11:15:54 +02:00
nf_nat_proto_gre.c [NETFILTER]: nf_conntrack: const annotations in nf_conntrack_sctp, nf_nat_proto_gre 2008-04-14 11:15:54 +02:00
nf_nat_proto_icmp.c [NETFILTER]: nf_nat: use bool type in nf_nat_proto 2008-04-14 11:15:53 +02:00
nf_nat_proto_sctp.c sctp: remove unnecessary byteshifting, calculate directly in big-endian 2008-07-18 23:07:09 -07:00
nf_nat_proto_tcp.c [NETFILTER]: nf_nat: use bool type in nf_nat_proto 2008-04-14 11:15:53 +02:00
nf_nat_proto_udp.c [NETFILTER]: nf_nat: use bool type in nf_nat_proto 2008-04-14 11:15:53 +02:00
nf_nat_proto_udplite.c [NETFILTER]: nf_nat: use bool type in nf_nat_proto 2008-04-14 11:15:53 +02:00
nf_nat_proto_unknown.c [NETFILTER]: nf_nat: use bool type in nf_nat_proto 2008-04-14 11:15:53 +02:00
nf_nat_rule.c netfilter: x_tables: remove unneeded initializations 2009-02-18 16:30:20 +01:00
nf_nat_sip.c net: replace NIPQUAD() in net/ipv4/netfilter/ 2008-10-31 00:53:08 -07:00
nf_nat_snmp_basic.c net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
nf_nat_standalone.c [NETFILTER]: nf_nat: kill helper and seq_adjust hooks 2008-04-14 11:15:52 +02:00
nf_nat_tftp.c [NETFILTER]: nf_{conntrack,nat}_tftp: annotate TFTP helper with const 2008-01-31 19:28:08 -08:00