diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 0549ca17ba6f..167a9533d951 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -245,4 +245,7 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
 int register_vmap_purge_notifier(struct notifier_block *nb);
 int unregister_vmap_purge_notifier(struct notifier_block *nb);
 
+/* Allow disabling lazy TLB flushing */
+extern bool lazy_vunmap_enable;
+
 #endif /* _LINUX_VMALLOC_H */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 817a472ee30f..3b56c30a8e93 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1277,6 +1277,7 @@ int unregister_vmap_purge_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL_GPL(unregister_vmap_purge_notifier);
 
+bool lazy_vunmap_enable  __read_mostly = true;
 /*
  * lazy_max_pages is the maximum amount of virtual address space we gather up
  * before attempting to purge with a TLB flush.
@@ -1297,6 +1298,9 @@ static unsigned long lazy_max_pages(void)
 {
 	unsigned int log;
 
+	if (!lazy_vunmap_enable)
+		return 0;
+
 	log = fls(num_online_cpus());
 
 	return log * (32UL * 1024 * 1024 / PAGE_SIZE);