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-rw-r--r--kernel/sched/fair.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 7727b0161579..37e895a941ab 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -27,6 +27,7 @@
#include <linux/profile.h>
#include <linux/interrupt.h>
#include <linux/mempolicy.h>
+#include <linux/migrate.h>
#include <linux/task_work.h>
#include <trace/events/sched.h>
@@ -861,6 +862,14 @@ void task_numa_work(struct callback_head *work)
if (cmpxchg(&mm->numa_next_scan, migrate, next_scan) != migrate)
return;
+ /*
+ * Do not set pte_numa if the current running node is rate-limited.
+ * This loses statistics on the fault but if we are unwilling to
+ * migrate to this node, it is less likely we can do useful work
+ */
+ if (migrate_ratelimited(numa_node_id()))
+ return;
+
start = mm->numa_scan_offset;
pages = sysctl_numa_balancing_scan_size;
pages <<= 20 - PAGE_SHIFT; /* MB in pages */