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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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2005-08-26 12:05:31 -07:00 • committed by David S. Miller
commit ba89966c19
29 changed files with 39 additions and 39 deletions
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2
net/dccp/ccids/ccid3.c
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@ -85,7 +85,7 @@ static int ccid3_debug;
static struct dccp_tx_hist *ccid3_tx_hist;
static struct dccp_rx_hist *ccid3_rx_hist;
static kmem_cache_t *ccid3_loss_interval_hist_slab;
static kmem_cache_t *ccid3_loss_interval_hist_slab __read_mostly;
static inline struct ccid3_loss_interval_hist_entry *
ccid3_loss_interval_hist_entry_new(const unsigned int __nocast prio)

2
net/dccp/proto.c
View file

@ -39,7 +39,7 @@
#include "ccid.h"
#include "dccp.h"
DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics);
DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly;
atomic_t dccp_orphan_count = ATOMIC_INIT(0);