1 files changed, 4 insertions, 1 deletions

diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index c8aa3f75bc4d..182bc30899d5 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -437,7 +437,10 @@ static struct page *rb_alloc_aux_page(int node, int order)
 
         if (page && order) {
                 /*
-                 * Communicate the allocation size to the driver
+                 * Communicate the allocation size to the driver:
+                 * if we managed to secure a high-order allocation,
+                 * set its first page's private to this order;
+                 * !PagePrivate(page) means it's just a normal page.
                  */
                 split_page(page, order);
                 SetPagePrivate(page);