Commit f7da677b authored by Vlastimil Babka's avatar Vlastimil Babka Committed by Linus Torvalds
Browse files

mm, page_owner: handle THP splits correctly

THP splitting path is missing the split_page_owner() call that
split_page() has.

As a result, split THP pages are wrongly reported in the page_owner file
as order-9 pages.  Furthermore when the former head page is freed, the
remaining former tail pages are not listed in the page_owner file at
all.  This patch fixes that by adding the split_page_owner() call into

Fixes: a9627bc5

 ("mm/page_owner: introduce split_page_owner and replace manual handling")
Reported-by: default avatarKirill A. Shutemov <>
Signed-off-by: default avatarVlastimil Babka <>
Cc: Michal Hocko <>
Cc: Mel Gorman <>
Cc: Matthew Wilcox <>
Cc: <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 46d0b24c
......@@ -32,6 +32,7 @@
#include <linux/shmem_fs.h>
#include <linux/oom.h>
#include <linux/numa.h>
#include <linux/page_owner.h>
#include <asm/tlb.h>
#include <asm/pgalloc.h>
......@@ -2516,6 +2517,9 @@ static void __split_huge_page(struct page *page, struct list_head *list,
split_page_owner(head, HPAGE_PMD_ORDER);
/* See comment in __split_huge_page_tail() */
if (PageAnon(head)) {
/* Additional pin to swap cache */
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