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-rw-r--r--kernel/sched/core.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3a673a3b0c6b..053dfd7692d1 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1132,18 +1132,28 @@ EXPORT_SYMBOL_GPL(kick_process);
*/
static int select_fallback_rq(int cpu, struct task_struct *p)
{
- const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(cpu));
+ int nid = cpu_to_node(cpu);
+ const struct cpumask *nodemask = NULL;
enum { cpuset, possible, fail } state = cpuset;
int dest_cpu;
- /* Look for allowed, online CPU in same node. */
- for_each_cpu(dest_cpu, nodemask) {
- if (!cpu_online(dest_cpu))
- continue;
- if (!cpu_active(dest_cpu))
- continue;
- if (cpumask_test_cpu(dest_cpu, tsk_cpus_allowed(p)))
- return dest_cpu;
+ /*
+ * If the node that the cpu is on has been offlined, cpu_to_node()
+ * will return -1. There is no cpu on the node, and we should
+ * select the cpu on the other node.
+ */
+ if (nid != -1) {
+ nodemask = cpumask_of_node(nid);
+
+ /* Look for allowed, online CPU in same node. */
+ for_each_cpu(dest_cpu, nodemask) {
+ if (!cpu_online(dest_cpu))
+ continue;
+ if (!cpu_active(dest_cpu))
+ continue;
+ if (cpumask_test_cpu(dest_cpu, tsk_cpus_allowed(p)))
+ return dest_cpu;
+ }
}
for (;;) {