linux-kernel - [PATCH v2 1/8] mm: migrate: remove PageTransHuge check in numamigrate_isolate

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230821115624.158759-2-wangkefeng.wang@huawei.com>
Date:   Mon, 21 Aug 2023 19:56:17 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <willy@...radead.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <ying.huang@...el.com>,
        <david@...hat.com>, Zi Yan <ziy@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>, <hughd@...gle.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v2 1/8] mm: migrate: remove PageTransHuge check in numamigrate_isolate_page()

Since we begin to convert the numa migration code to use folio, which
could let us to handle arbitrary sizes of folio, so drop assert that
we only support PageTransHuge page(PMD size) when order > 0.

Suggested-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 mm/migrate.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index b7fa020003f3..646d8ee7f102 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2483,8 +2483,6 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
 	int nr_pages = thp_nr_pages(page);
 	int order = compound_order(page);
 
-	VM_BUG_ON_PAGE(order && !PageTransHuge(page), page);
-
 	/* Do not migrate THP mapped by multiple processes */
 	if (PageTransHuge(page) && total_mapcount(page) > 1)
 		return 0;
-- 
2.41.0