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Eric Dumazet acb32ba3de ipv4: reduce percpu needs for icmpmsg mibs 
Reading /proc/net/snmp on a machine with a lot of cpus is very expensive
(can be ~88000 us).

This is because ICMPMSG MIB uses 4096 bytes per cpu, and folding values
for all possible cpus can read 16 Mbytes of memory.

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>
 		2011-11-09 16:04:20 -05:00
..
9p net/9p: Convert net/9p protocol dumps to tracepoints 2011-10-24 11:13:12 -05:00
802 net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
8021q 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
appletalk net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
atm net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
ax25 net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
batman-adv Merge branch 'batman-adv/maint' of git://git.open-mesh.org/linux-merge 2011-10-30 03:05:07 -04:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-11-07 10:55:33 -08:00
bridge 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
caif net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
can can: remove references to berlios mailinglist 2011-10-17 19:22:46 -04:00
ceph net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
core net: rename sk_clone to sk_clone_lock 2011-11-08 17:07:07 -05:00
dcb net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
dccp net: rename sk_clone to sk_clone_lock 2011-11-08 17:07:07 -05:00
decnet net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
dns_resolver
…
dsa net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
econet af_econet: Use current logging styles and neatening 2011-07-03 20:05:16 -07:00
ethernet net: don't clear IFF_XMIT_DST_RELEASE in ether_setup 2011-09-15 14:49:44 -04:00
ieee802154 net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
ipv4 ipv4: reduce percpu needs for icmpmsg mibs 2011-11-09 16:04:20 -05:00
ipv6 net: make ipv6 PKTINFO honour freebind 2011-11-08 15:13:03 -05:00
ipx net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
irda net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
iucv net: more accurate skb truesize 2011-10-13 16:05:07 -04:00
key net: Remove casts of void * 2011-06-16 23:19:27 -04:00
l2tp l2tp: fix l2tp_udp_recv_core() 2011-11-08 13:59:44 -05:00
lapb wan: make LAPB callbacks const 2011-09-16 19:20:20 -04:00
llc net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-11-07 10:55:33 -08:00
netfilter 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
netlabel Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net 2011-08-20 10:39:12 -07:00
netlink af_unix: dont send SCM_CREDENTIALS by default 2011-09-28 13:29:50 -04:00
netrom net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
nfc 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
packet af_packet: de-inline some helper functions 2011-11-03 18:11:51 -04:00
phonet net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
rds 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
rfkill net: add moduleparam.h for users of module_param/MODULE_PARM_DESC 2011-10-31 19:30:29 -04:00
rose net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
rxrpc net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
sched sch_choke: use skb_header_pointer() 2011-11-08 16:41:31 -05:00
sctp sctp: fasthandoff with ASCONF at server-node 2011-11-08 15:11:30 -05:00
sunrpc 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
tipc net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
unix af_unix: dont send SCM_CREDENTIALS by default 2011-09-28 13:29:50 -04:00
wanrouter wanrouter: Remove kernel_lock annotations 2011-11-07 13:27:30 -05:00
wimax net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
wireless net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
x25 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
xfrm net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
Kconfig NFC: add nfc subsystem core 2011-07-05 15:26:57 -04:00
Makefile NFC: add nfc subsystem core 2011-07-05 15:26:57 -04:00
compat.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
nonet.c
…
socket.c Merge branch 'master' of github.com:davem330/net 2011-09-22 03:23:13 -04:00
sysctl_net.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00