From be281e554e2a4cf2478df7a8b8926c89454bccfa Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 19 May 2011 01:14:23 +0000 Subject: ipv6: reduce per device ICMP mib sizes ipv6 has per device ICMP SNMP counters, taking too much space because they use percpu storage. needed size per device is : (512+4)*sizeof(long)*number_of_possible_cpus*2 On a 32bit kernel, 16 possible cpus, this wastes more than 64kbytes of memory per ipv6 enabled network device, taken in vmalloc pool. Since ICMP messages are rare, just use shared counters (atomic_long_t) Per network space ICMP counters are still using percpu memory, we might also convert them to shared counters in a future patch. Signed-off-by: Eric Dumazet CC: Denys Fedoryshchenko Signed-off-by: David S. Miller --- include/net/if_inet6.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/net/if_inet6.h') diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h index 0c603fe65377..11cf373970a9 100644 --- a/include/net/if_inet6.h +++ b/include/net/if_inet6.h @@ -154,8 +154,8 @@ struct ifacaddr6 { struct ipv6_devstat { struct proc_dir_entry *proc_dir_entry; DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); - DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6); - DEFINE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg); + DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); + DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); }; struct inet6_dev { -- cgit v1.2.1