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authorLinus Torvalds <torvalds@linux-foundation.org>2008-11-30 13:06:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-30 13:06:47 -0800
commit9bd062d9eaf9e790330f37d9f4518e1b95131f6c (patch)
treea209a707eddf645bdeed3e9c82603ead64eea515
parent72244c0e68dd664b894adb34a8772a6e4673b4c1 (diff)
parentaf6d596fd603219b054c1c90fb16672a9fd441bd (diff)
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: prevent divide by zero error in cpu_avg_load_per_task, update sched, cpusets: fix warning in kernel/cpuset.c sched: prevent divide by zero error in cpu_avg_load_per_task
-rw-r--r--kernel/cpuset.c2
-rw-r--r--kernel/sched.c5
2 files changed, 4 insertions, 3 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index da7ff6137f3..96c0ba13b8c 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -585,7 +585,7 @@ static int generate_sched_domains(cpumask_t **domains,
int i, j, k; /* indices for partition finding loops */
cpumask_t *doms; /* resulting partition; i.e. sched domains */
struct sched_domain_attr *dattr; /* attributes for custom domains */
- int ndoms; /* number of sched domains in result */
+ int ndoms = 0; /* number of sched domains in result */
int nslot; /* next empty doms[] cpumask_t slot */
doms = NULL;
diff --git a/kernel/sched.c b/kernel/sched.c
index 9b1e79371c2..b7480fb5c3d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1453,9 +1453,10 @@ static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
static unsigned long cpu_avg_load_per_task(int cpu)
{
struct rq *rq = cpu_rq(cpu);
+ unsigned long nr_running = ACCESS_ONCE(rq->nr_running);
- if (rq->nr_running)
- rq->avg_load_per_task = rq->load.weight / rq->nr_running;
+ if (nr_running)
+ rq->avg_load_per_task = rq->load.weight / nr_running;
else
rq->avg_load_per_task = 0;