From: Muchun Song <songmuchun@bytedance.com>
To: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Oscar Salvador <osalvador@suse.de>,
Mike Rapoport <rppt@kernel.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>,
"Liam R . Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Muchun Song <muchun.song@linux.dev>,
James Houghton <jthoughton@google.com>,
Lance Yang <lance.yang@linux.dev>, Qi Zheng <qi.zheng@linux.dev>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH 01/11] mm/mm_init: verify zones for template-initialized pages
Date: Mon, 9 Nov 2026 17:57:56 +0800 [thread overview]
Message-ID: <20261109095807.41547-2-songmuchun@bytedance.com> (raw)
In-Reply-To: <20261109095807.41547-1-songmuchun@bytedance.com>
Template-based ZONE_DEVICE initialization bypasses
__init_single_page(), which means copied struct pages do not run the
vmemmap zone consistency check.
Verify each destination after copying the template so the fast path gets
the same validation as regular page initialization.
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
mm/mm_init.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/mm_init.c b/mm/mm_init.c
index a9d848c92678..0129152b74d8 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -1082,6 +1082,7 @@ static void zone_device_page_init_from_template(struct page *page,
set_page_address(template, __va(pfn << PAGE_SHIFT));
#endif
memcpy_nontemporal(page, template, sizeof(*page));
+ vmemmap_optimization_verify_zone(page);
}
/*
--
2.54.0
next prev parent reply other threads:[~2026-11-09 9:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 9:57 [PATCH 00/11] mm: Unify memmap initialization for compound pages Muchun Song
2026-11-09 9:57 ` Muchun Song [this message]
2026-11-09 9:57 ` [PATCH 02/11] mm/mm_init: factor out common struct page initialization Muchun Song
2026-11-09 9:57 ` [PATCH 03/11] mm/mm_init: simplify zone device " Muchun Song
2026-11-09 9:57 ` [PATCH 04/11] mm/mm_init: factor out frozen compound " Muchun Song
2026-11-09 9:58 ` [PATCH 05/11] mm/hugetlb: drop boot-time HVO handling for gigantic folios Muchun Song
2026-11-09 9:58 ` [PATCH 06/11] mm/hugetlb: initialize all struct pages for bootmem hugepages Muchun Song
2026-11-09 9:58 ` [PATCH 07/11] mm/hugetlb: use common compound page initialization helper Muchun Song
2026-11-09 9:58 ` [PATCH 08/11] mm/mm_init: make __init_single_page() static Muchun Song
2026-11-09 9:58 ` [PATCH 09/11] mm/cma: centralize CMA pageblock initialization Muchun Song
2026-11-09 9:58 ` [PATCH 10/11] mm/cma: localize init_cma_pageblock() to cma.c Muchun Song
2026-11-09 9:58 ` [PATCH 11/11] mm/mm_init: move pageblock migratetype init to memmap helpers Muchun Song
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