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2a24444f8f
linux/net/ipv6
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Eric Dumazet 2a24444f8f ipv6: reduce percpu needs for icmpv6msg mibs 
Reading /proc/net/snmp6 on a machine with a lot of cpus is very
expensive (can be ~88000 us).

This is because ICMPV6MSG MIB uses 4096 bytes per cpu, and folding
values for all possible cpus can read 16 Mbytes of memory (32MBytes on
non x86 arches)

ICMP messages are not considered as fast path on a typical server, and
eventually few cpus handle them anyway. We can afford an atomic
operation instead of using percpu data.

This saves 4096 bytes per cpu and per network namespace.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-14 00:12:26 -05:00
..
netfilter netfilter: Remove unnecessary OOM logging messages 2011-11-01 09:19:49 +01:00
addrconf_core.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
addrconf.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
addrlabel.c
af_inet6.c ipv6: reduce percpu needs for icmpv6msg mibs 2011-11-14 00:12:26 -05:00
ah6.c
anycast.c
datagram.c net: make ipv6 PKTINFO honour freebind 2011-11-08 15:13:03 -05:00
esp6.c
exthdrs_core.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
exthdrs.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
fib6_rules.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
icmp.c net: more accurate skb truesize 2011-10-13 16:05:07 -04:00
inet6_connection_sock.c ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAIT 2011-10-27 00:44:35 -04:00
inet6_hashtables.c net: Compute protocol sequence numbers and fragment IDs using MD5. 2011-08-06 18:33:19 -07:00
ip6_fib.c cleanup: remove unnecessary include. 2011-10-19 19:26:16 -04:00
ip6_flowlabel.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
ip6_input.c ipv6: drop packets when source address is multicast 2011-11-08 12:37:06 -05:00
ip6_output.c ipv6: fix error propagation in ip6_ufo_append_data() 2011-10-28 00:26:00 -04:00
ip6_tunnel.c net: better pcpu data alignment 2011-11-08 15:10:59 -05:00
ip6mr.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
ipcomp6.c
ipv6_sockglue.c net: allow CAP_NET_RAW to set socket options IP{,V6}_TRANSPARENT 2011-10-20 18:21:36 -04:00
Kconfig
Makefile
mcast.c mcast: Fix source address selection for multicast listener report 2011-08-24 17:46:15 -07:00
mip6.c
ndisc.c ipv6: Do not use routes from locally generated RAs 2011-10-24 19:13:15 -04:00
netfilter.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
proc.c ipv6: reduce percpu needs for icmpv6msg mibs 2011-11-14 00:12:26 -05:00
protocol.c
raw.c ipv4: PKTINFO doesnt need dst reference 2011-11-09 16:36:27 -05:00
reassembly.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
route.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
sit.c net: better pcpu data alignment 2011-11-08 15:10:59 -05:00
syncookies.c tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
sysctl_net_ipv6.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
tcp_ipv6.c net: make the tcp and udp file_operations for the /proc stuff const 2011-11-01 17:56:14 -04:00
tunnel6.c
udp_impl.h
udp.c ipv4: PKTINFO doesnt need dst reference 2011-11-09 16:36:27 -05:00
udplite.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
xfrm6_input.c
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c xfrm6: Don't call icmpv6_send on local error 2011-10-18 23:53:10 -04:00
xfrm6_policy.c
xfrm6_state.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
xfrm6_tunnel.c