linux-kernel - [PATCH v1 0/3] mm/secretmem: one fix and one refactoring

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Date: Mon, 25 Mar 2024 14:41:11 +0100
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Rapoport <rppt@...nel.org>,
	Miklos Szeredi <mszeredi@...hat.com>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	xingwei lee <xrivendell7@...il.com>,
	yue sun <samsun1006219@...il.com>
Subject: [PATCH v1 0/3] mm/secretmem: one fix and one refactoring

Patch #1 fixes a GUP-fast issue, whereby we might succeed in pinning
secretmem folios. Patch #2 extends the memfd_secret selftest to cover
that case. Patch #3 removes folio_is_secretmem() and instead lets
folio_fast_pin_allowed() cover that case as well.

With this series, the reproducer (+selftests) works as expected. To
test patch #3, the gup_longterm test does exactly what we need, and
keeps on working as expected.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Mike Rapoport (IBM) <rppt@...nel.org>
Cc: Miklos Szeredi <mszeredi@...hat.com>
Cc: Lorenzo Stoakes <lstoakes@...il.com>
Cc: xingwei lee <xrivendell7@...il.com>
Cc: yue sun <samsun1006219@...il.com>

David Hildenbrand (3):
  mm/secretmem: fix GUP-fast succeeding on secretmem folios
  selftests/memfd_secret: add vmsplice() test
  mm: merge folio_is_secretmem() into folio_fast_pin_allowed()

 include/linux/secretmem.h                 | 21 ++---------
 mm/gup.c                                  | 33 ++++++++++-------
 tools/testing/selftests/mm/memfd_secret.c | 44 +++++++++++++++++++++--
 3 files changed, 65 insertions(+), 33 deletions(-)

-- 
2.43.2