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| author | Ying Xue <ying.xue@windriver.com> | 2012-08-16 12:09:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-20 02:26:31 -0700 |
| commit | 61cdd4d80b29cfdee45920238eea2d1fbb51f922 (patch) | |
| tree | 44df7d9694b581afae71955030ffbad25a4aee15 /net/tipc/core.h | |
| parent | f046e7d9be1cbb3335694c7f9a31d18e1f998ff5 (diff) | |
| download | linux-61cdd4d80b29cfdee45920238eea2d1fbb51f922.tar.gz linux-61cdd4d80b29cfdee45920238eea2d1fbb51f922.tar.bz2 linux-61cdd4d80b29cfdee45920238eea2d1fbb51f922.zip | |
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: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/core.h')
| -rw-r--r-- | net/tipc/core.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h index e4e46cd2d0e6..4c5705ac8a5a 100644 --- a/net/tipc/core.h +++ b/net/tipc/core.h @@ -74,17 +74,17 @@ int tipc_snprintf(char *buf, int len, const char *fmt, ...); /* * Global configuration variables */ -extern u32 tipc_own_addr; -extern int tipc_max_ports; +extern u32 tipc_own_addr __read_mostly; +extern int tipc_max_ports __read_mostly; extern int tipc_max_subscriptions; extern int tipc_max_publications; -extern int tipc_net_id; -extern int tipc_remote_management; +extern int tipc_net_id __read_mostly; +extern int tipc_remote_management __read_mostly; /* * Other global variables */ -extern int tipc_random; +extern int tipc_random __read_mostly; /* * Routines available to privileged subsystems |