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kernel-fxtec-pro1x/net/ipv4
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Eric Dumazet 230140cffa [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 
As done two years ago on IP route cache table (commit
22c047ccbc) , we can avoid using one
lock per hash bucket for the huge TCP/DCCP hash tables.

On a typical x86_64 platform, this saves about 2MB or 4MB of ram, for
litle performance differences. (we hit a different cache line for the
rwlock, but then the bucket cache line have a better sharing factor
among cpus, since we dirty it less often). For netstat or ss commands
that want a full scan of hash table, we perform fewer memory accesses.

Using a 'small' table of hashed rwlocks should be more than enough to
provide correct SMP concurrency between different buckets, without
using too much memory. Sizing of this table depends on
num_possible_cpus() and various CONFIG settings.

This patch provides some locking abstraction that may ease a future
work using a different model for TCP/DCCP table.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07 04:15:11 -08:00
..
ipvs [IPVS]: Synchronize closing of Connections 2007-11-07 04:15:10 -08:00
netfilter [NETFILTER]: remove unneeded rcu_dereference() calls 2007-11-07 04:08:23 -08:00
af_inet.c [NET]: Forget the zero_it argument of sk_alloc() 2007-11-01 00:39:31 -07:00
ah4.c cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
arp.c
cipso_ipv4.c [NetLabel]: correct usage of RCU locking 2007-10-26 04:29:08 -07:00
datagram.c
devinet.c
esp4.c [NET]: Fix incorrect sg_mark_end() calls. 2007-10-30 21:29:29 -07:00
fib_frontend.c [IPV4]: Compact some ifdefs in the fib code. 2007-11-07 04:11:41 -08:00
fib_hash.c
fib_lookup.h
fib_rules.c
fib_semantics.c
fib_trie.c remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
icmp.c [INET]: Unexport icmpmsg_statistics 2007-10-26 04:06:08 -07:00
igmp.c
inet_connection_sock.c [INET]: Justification for local port range robustness. 2007-10-18 22:00:17 -07:00
inet_diag.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
inet_fragment.c [INET]: Consolidate frag queues freeing 2007-10-17 19:48:26 -07:00
inet_hashtables.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
inet_lro.c fix endianness bug in inet_lro 2007-10-14 12:41:52 -07:00
inet_timewait_sock.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
inetpeer.c
ip_forward.c [IPV4]: Uninline netfilter okfns 2007-10-15 12:26:35 -07:00
ip_fragment.c [NET]: Fix uninitialised variable in ip_frag_reasm() 2007-10-17 21:37:22 -07:00
ip_gre.c [NET]: Treat the sign of the result of skb_headroom() consistently 2007-10-23 21:27:55 -07:00
ip_input.c [IPV4]: Uninline netfilter okfns 2007-10-15 12:26:35 -07:00
ip_options.c
ip_output.c [IPV4]: Consolidate the ip cork destruction in ip_output.c 2007-11-07 04:08:25 -08:00
ip_sockglue.c [IPV4]: Clean the ip_sockglue.c from some ugly ifdefs 2007-11-07 04:08:55 -08:00
ipcomp.c [IPSEC]: Fix crypto_alloc_comp error checking 2007-11-07 04:15:03 -08:00
ipconfig.c
ipip.c [NET]: Treat the sign of the result of skb_headroom() consistently 2007-10-23 21:27:55 -07:00
ipmr.c
Kconfig typo fixes 2007-10-20 01:34:40 +02:00
Makefile [INET]: Collect frag queues management objects together 2007-10-15 12:26:39 -07:00
netfilter.c [NETFILTER]: Replace sk_buff ** with sk_buff * 2007-10-15 12:26:29 -07:00
proc.c [NET]: Define infrastructure to keep 'inuse' changes in an efficent SMP/NUMA way. 2007-11-07 04:08:57 -08:00
protocol.c
raw.c [IPV4]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure 2007-11-07 04:08:58 -08:00
route.c
syncookies.c
sysctl_net_ipv4.c [INET]: Justification for local port range robustness. 2007-10-18 22:00:17 -07:00
tcp.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
tcp_bic.c
tcp_cong.c
tcp_cubic.c
tcp_diag.c [INET]: Let inet_diag and friends autoload 2007-10-22 02:59:54 -07:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c [TCP]: Another TAGBITS -> SACKED_ACKED|LOST conversion 2007-11-01 00:10:18 -07:00
tcp_ipv4.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
tcp_lp.c
tcp_minisocks.c
tcp_output.c
tcp_probe.c
tcp_scalable.c
tcp_timer.c
tcp_vegas.c [TCP] vegas: Fix a bug in disabling slow start by gamma parameter. 2007-10-29 22:37:25 -07:00
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tunnel4.c
udp.c [IPV4]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure 2007-11-07 04:08:58 -08:00
udp_impl.h
udplite.c [IPV4]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure 2007-11-07 04:08:58 -08:00
xfrm4_input.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_mode_beet.c [IPSEC]: Add missing BEET checks 2007-10-17 21:31:50 -07:00
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c [IPSEC]: Add missing BEET checks 2007-10-17 21:31:50 -07:00
xfrm4_output.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_policy.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_state.c [IPSEC]: Store afinfo pointer in xfrm_mode 2007-10-17 21:33:12 -07:00
xfrm4_tunnel.c [IPSEC]: Move tunnel parsing for IPv4 out of xfrm4_input 2007-10-17 21:28:53 -07:00