From: Vlastimil Babka <[email protected]> commit f7da677bc6e72033f0981b9d58b5c5d409fa641e upstream.
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 __split_huge_page(). Link: http://lkml.kernel.org/r/[email protected] Fixes: a9627bc5e34e ("mm/page_owner: introduce split_page_owner and replace manual handling") Reported-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Vlastimil Babka <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- mm/huge_memory.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -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> @@ -2500,6 +2501,9 @@ static void __split_huge_page(struct pag } ClearPageCompound(head); + + split_page_owner(head, HPAGE_PMD_ORDER); + /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { /* Additional pin to swap cache */
