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linux-next/include/net/netns
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
..
conntrack.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
core.h percpu: add __percpu sparse annotations to net 2010-02-16 23:05:38 -08:00
dccp.h [NETNS][DCCPV6]: Move the dccp_v6_ctl_sk on the struct net. 2008-04-13 22:32:25 -07:00
generic.h netns: let net_generic take pointer-to-const args 2010-11-21 10:05:10 -08:00
hash.h netns: introduce the net_hash_mix "salt" for hashes 2008-06-16 17:14:11 -07:00
ipv4.h net: ipv4: add IPPROTO_ICMP socket kind 2011-05-13 16:08:13 -04:00
ipv6.h ipv6: ip6mr: support multiple tables 2010-05-11 14:40:55 +02:00
mib.h ipv4: reduce percpu needs for icmpmsg mibs 2011-11-09 16:04:20 -05:00
packet.h packet: convert socket list to RCU (v3) 2010-02-22 15:45:56 -08:00
unix.h [NETNS]: struct net content re-work (v3) 2008-01-28 14:57:14 -08:00
x_tables.h net, netns_xt: shrink netns_xt members 2009-07-05 19:16:18 -07:00
xfrm.h netns: reorder fields in struct net 2010-10-17 13:49:14 -07:00