diff --git a/mm/ksm.c b/mm/ksm.c
index 7ee101e..e87dec7 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1914,9 +1914,11 @@
 		struct anon_vma_chain *vmac;
 		struct vm_area_struct *vma;
 
+		cond_resched();
 		anon_vma_lock_read(anon_vma);
 		anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root,
 					       0, ULONG_MAX) {
+			cond_resched();
 			vma = vmac->vma;
 			if (rmap_item->address < vma->vm_start ||
 			    rmap_item->address >= vma->vm_end)