Commit 61cdd4d8 authored by Ying Xue's avatar Ying Xue Committed by David S. Miller

tipc: add __read_mostly annotations to several global variables

Added to the following:

 - tipc_random
 - tipc_own_addr
 - tipc_max_ports
 - tipc_net_id
 - tipc_remote_management
 - handler_enabled

The above global variables are read often, but written rarely. Use
__read_mostly to prevent them being on the same cacheline as another
variable which is written to often, which would cause cacheline
bouncing.
Signed-off-by: default avatarYing Xue <ying.xue@windriver.com>
Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f046e7d9
...@@ -48,15 +48,15 @@ ...@@ -48,15 +48,15 @@
/* global variables used by multiple sub-systems within TIPC */ /* global variables used by multiple sub-systems within TIPC */
int tipc_random; int tipc_random __read_mostly;
/* configurable TIPC parameters */ /* configurable TIPC parameters */
u32 tipc_own_addr; u32 tipc_own_addr __read_mostly;
int tipc_max_ports; int tipc_max_ports __read_mostly;
int tipc_max_subscriptions; int tipc_max_subscriptions;
int tipc_max_publications; int tipc_max_publications;
int tipc_net_id; int tipc_net_id __read_mostly;
int tipc_remote_management; int tipc_remote_management __read_mostly;
/** /**
......
...@@ -74,17 +74,17 @@ int tipc_snprintf(char *buf, int len, const char *fmt, ...); ...@@ -74,17 +74,17 @@ int tipc_snprintf(char *buf, int len, const char *fmt, ...);
/* /*
* Global configuration variables * Global configuration variables
*/ */
extern u32 tipc_own_addr; extern u32 tipc_own_addr __read_mostly;
extern int tipc_max_ports; extern int tipc_max_ports __read_mostly;
extern int tipc_max_subscriptions; extern int tipc_max_subscriptions;
extern int tipc_max_publications; extern int tipc_max_publications;
extern int tipc_net_id; extern int tipc_net_id __read_mostly;
extern int tipc_remote_management; extern int tipc_remote_management __read_mostly;
/* /*
* Other global variables * Other global variables
*/ */
extern int tipc_random; extern int tipc_random __read_mostly;
/* /*
* Routines available to privileged subsystems * Routines available to privileged subsystems
......
...@@ -45,7 +45,7 @@ struct queue_item { ...@@ -45,7 +45,7 @@ struct queue_item {
static struct kmem_cache *tipc_queue_item_cache; static struct kmem_cache *tipc_queue_item_cache;
static struct list_head signal_queue_head; static struct list_head signal_queue_head;
static DEFINE_SPINLOCK(qitem_lock); static DEFINE_SPINLOCK(qitem_lock);
static int handler_enabled; static int handler_enabled __read_mostly;
static void process_signal_queue(unsigned long dummy); static void process_signal_queue(unsigned long dummy);
......
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