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authorParthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>2016-02-02 12:52:16 +0300
committerDavid S. Miller <davem@davemloft.net>2016-02-06 11:41:58 +0300
commitae245557f87fffe2e1c39ba07524024e650e822b (patch)
tree73a16eb24a35386f5b86e02a1381eb73777c01af /net/tipc/subscr.c
parentf3ad288c56d21e3b8ec77e13ab9aa06dbbfa3577 (diff)
downloadlinux-ae245557f87fffe2e1c39ba07524024e650e822b.tar.xz
tipc: donot create timers if subscription timeout = TIPC_WAIT_FOREVER
Until now, we create timers even for the subscription requests with timeout = TIPC_WAIT_FOREVER. This can be improved by avoiding timer creation when the timeout is set to TIPC_WAIT_FOREVER. In this commit, we introduce a check to creates timers only when timeout != TIPC_WAIT_FOREVER. Acked-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/subscr.c')
-rw-r--r--net/tipc/subscr.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 7d226ecb0490..22963cafd5ed 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -188,12 +188,14 @@ static struct tipc_subscriber *tipc_subscrb_create(int conid)
static void tipc_subscrb_delete(struct tipc_subscriber *subscriber)
{
struct tipc_subscription *sub, *temp;
+ u32 timeout;
spin_lock_bh(&subscriber->lock);
/* Destroy any existing subscriptions for subscriber */
list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
subscrp_list) {
- if (del_timer(&sub->timer)) {
+ timeout = htohl(sub->evt.s.timeout, sub->swap);
+ if ((timeout == TIPC_WAIT_FOREVER) || del_timer(&sub->timer)) {
tipc_subscrp_delete(sub);
tipc_subscrb_put(subscriber);
}
@@ -217,13 +219,16 @@ static void tipc_subscrp_cancel(struct tipc_subscr *s,
struct tipc_subscriber *subscriber)
{
struct tipc_subscription *sub, *temp;
+ u32 timeout;
spin_lock_bh(&subscriber->lock);
/* Find first matching subscription, exit if not found */
list_for_each_entry_safe(sub, temp, &subscriber->subscrp_list,
subscrp_list) {
if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
- if (del_timer(&sub->timer)) {
+ timeout = htohl(sub->evt.s.timeout, sub->swap);
+ if ((timeout == TIPC_WAIT_FOREVER) ||
+ del_timer(&sub->timer)) {
tipc_subscrp_delete(sub);
tipc_subscrb_put(subscriber);
}
@@ -267,7 +272,6 @@ static struct tipc_subscription *tipc_subscrp_create(struct net *net,
sub->swap = swap;
memcpy(&sub->evt.s, s, sizeof(*s));
atomic_inc(&tn->subscription_count);
- setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
return sub;
}
@@ -290,6 +294,10 @@ static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
spin_unlock_bh(&subscriber->lock);
timeout = htohl(sub->evt.s.timeout, swap);
+ if (timeout == TIPC_WAIT_FOREVER)
+ return;
+
+ setup_timer(&sub->timer, tipc_subscrp_timeout, (unsigned long)sub);
mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
}