diff --git a/mm/rmap.c b/mm/rmap.c
index f69d534..4c52c56 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -538,6 +538,9 @@
 	if (pte_dirty(pteval))
 		set_page_dirty(page);
 
+	/* Update high watermark before we lower rss */
+	update_hiwater_rss(mm);
+
 	if (PageAnon(page)) {
 		swp_entry_t entry = { .val = page->private };
 		/*
@@ -628,6 +631,9 @@
 	if (!pmd_present(*pmd))
 		goto out_unlock;
 
+	/* Update high watermark before we lower rss */
+	update_hiwater_rss(mm);
+
 	for (original_pte = pte = pte_offset_map(pmd, address);
 			address < end; pte++, address += PAGE_SIZE) {