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/[email protected] Fixes: 44042b4 ("mm/page_alloc: allow high-order pages to be stored on the per-cpu lists") Signed-off-by: Yafang Shao <[email protected]> Acked-by: Mel Gorman <[email protected]> Reviewed-by: Miaohe Lin <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
kawasaki · Oct 13, 2022 · 15cd900 · 15cd900
1 parent 26c92d3
commit 15cd900
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
@@ -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;