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>
diff --git a/net/tipc/handler.c b/net/tipc/handler.c
index 7a52d39..111ff83 100644
--- a/net/tipc/handler.c
+++ b/net/tipc/handler.c
@@ -45,7 +45,7 @@
static struct kmem_cache *tipc_queue_item_cache;
static struct list_head signal_queue_head;
static DEFINE_SPINLOCK(qitem_lock);
-static int handler_enabled;
+static int handler_enabled __read_mostly;
static void process_signal_queue(unsigned long dummy);