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[NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers

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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>
This commit is contained in:
Eric Dumazet
2005-08-26 12:05:31 -07:00
committed by David S. Miller
parent 29cb9f9c55
commit ba89966c19
29 changed files with 39 additions and 39 deletions
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net/core/flow.c
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@@ -42,7 +42,7 @@ static DEFINE_PER_CPU(struct flow_cache_entry **, flow_tables) = { NULL };
#define flow_table(cpu) (per_cpu(flow_tables, cpu))
static kmem_cache_t *flow_cachep;
static kmem_cache_t *flow_cachep __read_mostly;
static int flow_lwm, flow_hwm;