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kernel-fxtec-pro1x/net/ipv4
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Eric W. Biederman 575f4cd5a5 net: Use rcu lookups in inet_twsk_purge. 
While we are looking up entries to free there is no reason to take
the lock in inet_twsk_purge.  We have to drop locks and restart
occassionally anyway so adding a few more in case we get on the
wrong list because of a timewait move is no big deal.  At the
same time not taking the lock for long periods of time is much
more polite to the rest of the users of the hash table.

In my test configuration of killing 4k network namespaces
this change causes 4k back to back runs of inet_twsk_purge on an
empty hash table to go from roughly 20.7s to 3.3s, and the total
time to destroy 4k network namespaces goes from roughly 44s to
3.3s.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03 12:23:47 -08:00
..
netfilter net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
af_inet.c net: check kern before calling security subsystem 2009-11-05 22:18:18 -08:00
ah4.c xfrm: Use the user specified truncation length in ESP and AH 2009-11-25 15:48:41 -08:00
arp.c
cipso_ipv4.c
datagram.c
devinet.c ipv4 05/05: add sysctl to accept packets with local source addresses 2009-12-03 12:14:38 -08:00
esp4.c xfrm: Use the user specified truncation length in ESP and AH 2009-11-25 15:48:41 -08:00
fib_frontend.c ipv4 05/05: add sysctl to accept packets with local source addresses 2009-12-03 12:14:38 -08:00
fib_hash.c
fib_lookup.h
fib_rules.c net: Allow fib_rule_unregister to batch 2009-12-03 12:22:55 -08:00
fib_semantics.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
fib_trie.c
icmp.c icmp: icmp_send() can avoid a dev_put() 2009-11-01 23:55:10 -08:00
igmp.c net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
inet_connection_sock.c TCPCT part 1a: add request_values parameter for sending SYNACK 2009-12-02 22:07:23 -08:00
inet_diag.c
inet_fragment.c
inet_hashtables.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
inet_lro.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
inet_timewait_sock.c net: Use rcu lookups in inet_twsk_purge. 2009-12-03 12:23:47 -08:00
inetpeer.c inetpeer: Optimize inet_getid() 2009-11-13 20:46:58 -08:00
ip_forward.c
ip_fragment.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-12-01 22:13:38 -08:00
ip_gre.c net: Simplify ip_gre pernet operations. 2009-12-01 16:15:57 -08:00
ip_input.c net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ip_options.c
ip_output.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-12-01 22:13:38 -08:00
ip_sockglue.c net: Cleanup redundant tests on unsigned 2009-10-29 01:39:54 -07:00
ipcomp.c
ipconfig.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
ipip.c net: Simplify ipip pernet operations. 2009-12-01 16:15:58 -08:00
ipmr.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-11-17 00:05:02 -08:00
Kconfig
Makefile
netfilter.c net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
proc.c
protocol.c
raw.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-10-29 21:28:59 -07:00
route.c net: NETDEV_UNREGISTER_PERNET -> NETDEV_UNREGISTER_BATCH 2009-12-01 16:15:50 -08:00
syncookies.c TCPCT part 1g: Responder Cookie => Initiator 2009-12-02 22:07:26 -08:00
sysctl_net_ipv4.c TCPCT part 1c: sysctl_tcp_cookie_size, socket option TCP_COOKIE_TRANSACTIONS 2009-12-02 22:07:24 -08:00
tcp.c TCPCT part 1e: implement socket option TCP_COOKIE_TRANSACTIONS 2009-12-02 22:07:25 -08:00
tcp_bic.c
tcp_cong.c
tcp_cubic.c
tcp_diag.c
tcp_highspeed.c
tcp_htcp.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
tcp_hybla.c
tcp_illinois.c
tcp_input.c TCPCT part 1g: Responder Cookie => Initiator 2009-12-02 22:07:26 -08:00
tcp_ipv4.c TCPCT part 1g: Responder Cookie => Initiator 2009-12-02 22:07:26 -08:00
tcp_lp.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
tcp_minisocks.c TCPCT part 1g: Responder Cookie => Initiator 2009-12-02 22:07:26 -08:00
tcp_output.c tcp: sysctl_tcp_cookie_size needs to be exported to modules. 2009-12-02 22:18:58 -08:00
tcp_probe.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
tcp_scalable.c
tcp_timer.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
tcp_westwood.c
tcp_yeah.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
tunnel4.c
udp.c net/ipv4: Move && and || to end of previous line 2009-11-23 10:41:23 -08:00
udp_impl.h
udplite.c net: drop capability from protocol definitions 2009-11-05 21:40:17 -08:00
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_state.c
xfrm4_tunnel.c