diff --git a/mm/memory.c b/mm/memory.c
index 2366578015ad..b95a43221058 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -78,6 +78,7 @@
 #include <linux/ptrace.h>
 #include <linux/vmalloc.h>
 #include <linux/sched/sysctl.h>
+#include <linux/delay.h>
 
 #include <trace/events/kmem.h>
 
@@ -410,6 +411,13 @@ void free_pgtables(struct mmu_gather *tlb, struct ma_state *mas,
 				unlink_file_vma_batch_add(&vb, vma);
 			}
 			unlink_file_vma_batch_final(&vb);
+
+			if (strcmp(current->comm, "SLOWME1") == 0) {
+				pr_warn("%s: starting delay\n", __func__);
+				mdelay(2000);
+				pr_warn("%s: ending delay\n", __func__);
+			}
+
 			free_pgd_range(tlb, addr, vma->vm_end,
 				floor, next ? next->vm_start : ceiling);
 		}
@@ -1711,6 +1719,13 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
 	unsigned long next;
 
 	pmd = pmd_offset(pud, addr);
+
+	if (strcmp(current->comm, "SLOWME2") == 0) {
+		pr_warn("%s: starting delay\n", __func__);
+		mdelay(2000);
+		pr_warn("%s: ending delay\n", __func__);
+	}
+
 	do {
 		next = pmd_addr_end(addr, end);
 		if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) {