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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-01-14 20:20:43 -0800
committerAnders Roxell <anders.roxell@linaro.org>2015-06-01 12:03:37 +0200
commit67343ee10dd14b2f21373f92317d81e285051c74 (patch)
tree792fab54d40678e7a97efe99e8732f1e65aac957
parent0b5d49fbc941059f0fd92ce92ab920aefb6a6b68 (diff)
downloadlinux-linaro-stable-67343ee10dd14b2f21373f92317d81e285051c74.tar.gz
timers: Track total number of timers in list
upstream commit: fff421580f512fc044cc7421fdff31a7a6997350 Currently, the tvec_base structure's ->active_timers field tracks only the non-deferrable timers, which means that even if ->active_timers is zero, there might well be deferrable timers in the list. This commit therefore adds an ->all_timers field to track all the timers, whether deferrable or not. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Tested-by: Mike Galbraith <bitbucket@online.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-rw-r--r--kernel/timer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 8f1687a4b9c2..251fdacfebdb 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -84,6 +84,7 @@ struct tvec_base {
unsigned long timer_jiffies;
unsigned long next_timer;
unsigned long active_timers;
+ unsigned long all_timers;
struct tvec_root tv1;
struct tvec tv2;
struct tvec tv3;
@@ -395,6 +396,7 @@ static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
base->next_timer = timer->expires;
base->active_timers++;
}
+ base->all_timers++;
}
#ifdef CONFIG_TIMER_STATS
@@ -674,6 +676,7 @@ detach_expired_timer(struct timer_list *timer, struct tvec_base *base)
detach_timer(timer, true);
if (!tbase_get_deferrable(timer->base))
base->active_timers--;
+ base->all_timers--;
}
static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
@@ -688,6 +691,7 @@ static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
if (timer->expires == base->next_timer)
base->next_timer = base->timer_jiffies;
}
+ base->all_timers--;
return 1;
}
@@ -1677,6 +1681,7 @@ static int init_timers_cpu(int cpu)
base->timer_jiffies = jiffies;
base->next_timer = base->timer_jiffies;
base->active_timers = 0;
+ base->all_timers = 0;
return 0;
}