1 files changed, 4 insertions, 0 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index e41375a..92e14dc 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -177,6 +177,10 @@ static void anon_vma_chain_link(struct vm_area_struct *vma,
 	list_add(&avc->same_vma, &vma->anon_vma_chain);
 
 	anon_vma_lock(anon_vma);
+	/*
+	 * It's critical to add new vmas to the tail of the anon_vma,
+	 * see comment in huge_memory.c:__split_huge_page().
+	 */
 	list_add_tail(&avc->same_anon_vma, &anon_vma->head);
 	anon_vma_unlock(anon_vma);
 }