From: Ming Lin <mlin@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Simon Ser <contact@emersion.fr>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Ming Lin <mlin@kernel.org>
Subject: [PATCH 0/2] mm: adds MAP_NOSIGBUS extension for shmem read
Date: Tue, 1 Jun 2021 16:22:31 -0700 [thread overview]
Message-ID: <1622589753-9206-1-git-send-email-mlin@kernel.org> (raw)
These 2 patches are based on the discussion of "Sealed memfd & no-fault mmap"
at https://bit.ly/3pdwOGR
patch 1: make "vm_flags" be an u64, so we can have enough bits on 32-bit
architectures. Then we can add VM_NOSIGBUS which is bit 38.
patch 2: support no-fault mmap for shmem read
Ming Lin (2):
mm: make "vm_flags" be an u64
mm: adds NOSIGBUS extension for out-of-band shmem read
arch/arm64/Kconfig | 1 -
arch/powerpc/Kconfig | 1 -
arch/x86/Kconfig | 1 -
include/linux/mm.h | 102 ++++++++++++++++-----------------
include/linux/mm_types.h | 4 +-
include/linux/mman.h | 5 +-
include/uapi/asm-generic/mman-common.h | 1 +
mm/Kconfig | 2 -
mm/memory.c | 2 +-
mm/mmap.c | 5 +-
mm/shmem.c | 17 +++++-
11 files changed, 76 insertions(+), 65 deletions(-)
--
1.8.3.1
next reply other threads:[~2021-06-01 23:22 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-01 23:22 Ming Lin [this message]
2021-06-01 23:22 ` [PATCH 1/2] mm: make "vm_flags" be an u64 Ming Lin
2021-06-02 1:58 ` kernel test robot
2021-06-02 2:06 ` kernel test robot
2021-06-01 23:22 ` [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read Ming Lin
2021-06-02 0:16 ` Linus Torvalds
2021-06-02 1:06 ` Ming Lin
2021-06-02 2:13 ` Hugh Dickins
2021-06-02 2:02 ` kernel test robot
2021-06-02 3:49 ` Hugh Dickins
2021-06-03 0:05 ` Ming Lin
2021-06-03 0:46 ` Hugh Dickins
2021-06-03 18:25 ` Linus Torvalds
2021-06-03 19:07 ` Hugh Dickins
2021-06-03 19:12 ` Linus Torvalds
2021-06-03 19:15 ` Linus Torvalds
2021-06-03 19:24 ` Andy Lutomirski
2021-06-03 19:35 ` Simon Ser
2021-06-03 19:57 ` Ming Lin
2021-06-02 9:30 ` kernel test robot
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