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Commit ba89966c authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

[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: default avatarEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 29cb9f9c

net/bridge/br_fdb.c

+1 −1
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
#include <asm/atomic.h>

#include "br_private.h"



static kmem_cache_t *br_fdb_cache;

static kmem_cache_t *br_fdb_cache __read_mostly;

static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,

		      const unsigned char *addr);

net/core/flow.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

net/core/skbuff.c

+2 −2
Original line number Diff line number Diff line
@@ -68,8 +68,8 @@ 
#include <asm/uaccess.h>

#include <asm/system.h>



static kmem_cache_t *skbuff_head_cache;

static kmem_cache_t *skbuff_fclone_cache;

static kmem_cache_t *skbuff_head_cache __read_mostly;

static kmem_cache_t *skbuff_fclone_cache __read_mostly;



struct timeval __read_mostly skb_tv_base;

net/dccp/ccids/ccid3.c

+1 −1
Original line number Diff line number Diff line
@@ -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)

net/dccp/proto.c

+1 −1
Original line number Diff line number Diff line
@@ -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);