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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cascardo/linux.git]
/
kernel
/
sched
/
fair.c
diff --git
a/kernel/sched/fair.c
b/kernel/sched/fair.c
index
502e95a
..
76ee7de
100644
(file)
--- a/
kernel/sched/fair.c
+++ b/
kernel/sched/fair.c
@@
-5471,13
+5471,18
@@
static inline int select_idle_smt(struct task_struct *p, struct sched_domain *sd
*/
static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, int target)
{
*/
static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, int target)
{
- struct sched_domain *this_sd = rcu_dereference(*this_cpu_ptr(&sd_llc));
- u64 avg_idle = this_rq()->avg_idle;
- u64 avg_cost = this_sd->avg_scan_cost;
+ struct sched_domain *this_sd;
+ u64 avg_cost, avg_idle = this_rq()->avg_idle;
u64 time, cost;
s64 delta;
int cpu, wrap;
u64 time, cost;
s64 delta;
int cpu, wrap;
+ this_sd = rcu_dereference(*this_cpu_ptr(&sd_llc));
+ if (!this_sd)
+ return -1;
+
+ avg_cost = this_sd->avg_scan_cost;
+
/*
* Due to large variance we need a large fuzz factor; hackbench in
* particularly is sensitive here.
/*
* Due to large variance we need a large fuzz factor; hackbench in
* particularly is sensitive here.
@@
-8522,7
+8527,7
@@
static void nohz_idle_balance(struct rq *this_rq, enum cpu_idle_type idle) { }
* run_rebalance_domains is triggered when needed from the scheduler tick.
* Also triggered for nohz idle balancing (with nohz_balancing_kick set).
*/
* run_rebalance_domains is triggered when needed from the scheduler tick.
* Also triggered for nohz idle balancing (with nohz_balancing_kick set).
*/
-static void run_rebalance_domains(struct softirq_action *h)
+static
__latent_entropy
void run_rebalance_domains(struct softirq_action *h)
{
struct rq *this_rq = this_rq();
enum cpu_idle_type idle = this_rq->idle_balance ?
{
struct rq *this_rq = this_rq();
enum cpu_idle_type idle = this_rq->idle_balance ?