+ mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch added to mm-unstable branch

+ mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/page_alloc: fix incorrect PGFREE and PGALLOC for high-order page
has been added to the -mm mm-unstable branch.  Its filename is
     mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Yafang Shao <laoar.shao@gmail.com>
Subject: mm/page_alloc: fix incorrect PGFREE and PGALLOC for high-order page
Date: Thu, 6 Oct 2022 10:15:40 +0000

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: 44042b449872 ("mm/page_alloc: allow high-order pages to be stored on the per-cpu lists")
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/page_alloc.c~mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page
+++ a/mm/page_alloc.c
@@ -3446,7 +3446,7 @@ static void free_unref_page_commit(struc
 	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(stru
 	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;
_

Patches currently in -mm which might be from laoar.shao@gmail.com are

mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch