Commit 15cd9004 authored by Yafang Shao's avatar Yafang Shao Committed by Andrew Morton
Browse files

mm/page_alloc: fix incorrect PGFREE and PGALLOC for high-order page 

PGFREE and PGALLOC represent the number of freed and allocated pages.  So
the page order must be considered.

Link: https://lkml.kernel.org/r/20221006101540.40686-1-laoar.shao@gmail.com


Fixes: 44042b44 ("mm/page_alloc: allow high-order pages to be stored on the per-cpu lists")
Signed-off-by: default avatarYafang Shao <laoar.shao@gmail.com>
Acked-by: default avatarMel Gorman <mgorman@techsingularity.net>
Reviewed-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 26c92d37

mm/page_alloc.c

+2 −2
Original line number Diff line number Diff line
@@ -3446,7 +3446,7 @@ static void free_unref_page_commit(struct zone *zone, struct per_cpu_pages *pcp, 
	int pindex;

	bool free_high;



	__count_vm_event(PGFREE);

	__count_vm_events(PGFREE, 1 << order);

	pindex = order_to_pindex(migratetype, order);

	list_add(&page->pcp_list, &pcp->lists[pindex]);

	pcp->count += 1 << order;
@@ -3803,7 +3803,7 @@ static struct page *rmqueue_pcplist(struct zone *preferred_zone, 
	pcp_spin_unlock_irqrestore(pcp, flags);

	pcp_trylock_finish(UP_flags);

	if (page) {

		__count_zid_vm_events(PGALLOC, page_zonenum(page), 1);

		__count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order);

		zone_statistics(preferred_zone, zone, 1);

	}

	return page;