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From: Zi Yan <zi.yan@sent.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	linux-mips@vger.kernel.org
Cc: Zi Yan <ziy@nvidia.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	David Hildenbrand <david@redhat.com>,
	Mike Kravetz <mike.kravetz@oracle.com>,
	Muchun Song <muchun.song@linux.dev>,
	"Mike Rapoport (IBM)" <rppt@kernel.org>
Subject: [PATCH 0/3] Use nth_page() in place of direct struct page manipulation
Date: Wed, 30 Aug 2023 14:27:50 -0400	[thread overview]
Message-ID: <20230830182753.55367-1-zi.yan@sent.com> (raw)

From: Zi Yan <ziy@nvidia.com>

On SPARSEMEM without VMEMMAP, struct page is not guaranteed to be
contiguous, since each memory section's memmap might be allocated
independently. hugetlb pages can go beyond a memory section size, thus
direct struct page manipulation on hugetlb pages/subpages might give
wrong struct page. Kernel provides nth_page() to do the manipulation
properly. Use that whenever code can see hugetlb pages.

The patches are on top of next-20230830.

Zi Yan (3):
  mm: use nth_page() in place of direct struct page manipulation.
  fs: use nth_page() in place of direct struct page manipulation.
  mips: use nth_page() in place of direct struct page manipulation.

 arch/mips/mm/cache.c | 2 +-
 fs/hugetlbfs/inode.c | 4 ++--
 mm/cma.c             | 2 +-
 mm/hugetlb.c         | 2 +-
 mm/memory_hotplug.c  | 2 +-
 5 files changed, 6 insertions(+), 6 deletions(-)

-- 
2.40.1



             reply	other threads:[~2023-08-30 18:28 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-30 18:27 Zi Yan [this message]
2023-08-30 18:27 ` [PATCH 1/3] mm: use nth_page() in place of direct struct page manipulation Zi Yan
2023-08-31  7:14   ` Muchun Song
2023-08-31 15:37     ` Zi Yan
2023-08-30 18:27 ` [PATCH 2/3] fs: " Zi Yan
2023-08-31  7:17   ` [PATCH 2/3] " Muchun Song
2023-08-31 15:37     ` Zi Yan
2023-08-30 18:27 ` [PATCH 3/3] mips: " Zi Yan

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