| From | Miaohe Lin <> | Subject | [PATCH 08/16] mm/page_alloc: add missing is_migrate_isolate() check in set_page_guard() | Date | Fri, 9 Sep 2022 17:24:43 +0800 |
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In MIGRATE_ISOLATE case, zone freepage state shouldn't be modified as caller will take care of it. Add missing is_migrate_isolate() here to avoid possible unbalanced freepage state.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a35ef385d906..94baf33da865 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -873,7 +873,8 @@ static inline bool set_page_guard(struct zone *zone, struct page *page, INIT_LIST_HEAD(&page->buddy_list); set_page_private(page, order); /* Guard pages are not available for any usage */ - __mod_zone_freepage_state(zone, -(1 << order), migratetype); + if (!is_migrate_isolate(migratetype)) + __mod_zone_freepage_state(zone, -(1 << order), migratetype); return true; } -- 2.23.0
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