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authorEric Dumazet <dada1@cosmosbay.com>2005-08-26 23:05:31 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-30 03:11:18 +0400
commitba89966c1984513f4f2cc0a6c182266be44ddd03 (patch)
tree6e5766fc5c287708c03e0a162531dfd4785b0703 /net/ipv4/ip_input.c
parent29cb9f9c5502f6218cd3ea574efe46a5e55522d2 (diff)
downloadlinux-ba89966c1984513f4f2cc0a6c182266be44ddd03.tar.xz
[NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers
This patch puts mostly read only data in the right section (read_mostly), to help sharing of these data between CPUS without memory ping pongs. On one of my production machine, tcp_statistics was sitting in a heavily modified cache line, so *every* SNMP update had to force a reload. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_input.c')
-rw-r--r--net/ipv4/ip_input.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 220a8b5920ea..473d0f2b2e0d 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -150,7 +150,7 @@
* SNMP management statistics
*/
-DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics);
+DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics) __read_mostly;
/*
* Process Router Attention IP option