Commit fab765c2 authored by Sergei Trofimovich's avatar Sergei Trofimovich Committed by Linus Torvalds
Browse files

mm: page_owner: fetch backtrace only for tracked pages 

Very minor optimization.

Link: https://lkml.kernel.org/r/20210401212445.3534721-1-slyfox@gentoo.org


Signed-off-by: default avatarSergei Trofimovich <slyfox@gentoo.org>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 64ea78d2

mm/page_owner.c

+3 −3
Original line number Diff line number Diff line
@@ -147,15 +147,15 @@ void __reset_page_owner(struct page *page, unsigned int order) 
{

	int i;

	struct page_ext *page_ext;

	depot_stack_handle_t handle = 0;

	depot_stack_handle_t handle;

	struct page_owner *page_owner;

	u64 free_ts_nsec = local_clock();



	handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);



	page_ext = lookup_page_ext(page);

	if (unlikely(!page_ext))

		return;



	handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);

	for (i = 0; i < (1 << order); i++) {

		__clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);

		page_owner = get_page_owner(page_ext);