1 files changed, 10 insertions, 0 deletions

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index de9b4d8eb853..fbc0c84a8a04 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1231,6 +1231,16 @@ void task_numa_work(struct callback_head *work)
                 if (!vma_migratable(vma) || !vma_policy_mof(p, vma))
                         continue;
 
+                /*
+                 * Shared library pages mapped by multiple processes are not
+                 * migrated as it is expected they are cache replicated. Avoid
+                 * hinting faults in read-only file-backed mappings or the vdso
+                 * as migrating the pages will be of marginal benefit.
+                 */
+                if (!vma->vm_mm ||
+                    (vma->vm_file && (vma->vm_flags & (VM_READ|VM_WRITE)) == (VM_READ)))
+                        continue;
+
                 do {
                         start = max(start, vma->vm_start);
                         end = ALIGN(start + (pages << PAGE_SHIFT), HPAGE_SIZE);