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@xxxxxxxxx>
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@xxxxxxxxx
Fixes: 44042b449872 ("mm/page_alloc: allow high-order pages to be stored on the per-cpu lists")
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxx are
mm-page_alloc-fix-incorrect-pgfree-and-pgalloc-for-high-order-page.patch
