Re: [PATCH 0/8] Add selftests for mshare

[Yongting Lin <linyongting@bytedance.com>]

Sorry for the mistake! I accidentally sent each individual patch twice,
except for the cover letter. Please ignore the duplicated ones at the
bottom.

Apologies again for the noise.

Yongting Lin.

On Mon, Aug 25, 2025 at 10:57 PM Yongting Lin <linyongting@bytedance.com> wrote:
>
> Mshare is a developing feature proposed by Anthony Yznaga and Khalid Aziz
> that enables sharing of PTEs across processes. The V3 patch set has been
> posted for review:
>
> https://lore.kernel.org/linux-mm/20250820010415.699353-1-anthony.yznaga@oracle.com/
>
> This patch set adds selftests to exercise and demonstrate basic
> functionality of mshare.
>
> The initial tests use open, ioctl, and mmap syscalls to establish a shared
> memory mapping between two processes and verify the expected behavior.
>
> Additional tests are included to check interoperability with swap and
> Transparent Huge Pages.
>
> Future work will extend coverage to other use cases such as integration
> with KVM and more advanced scenarios.
>
> This series is intended to be applied on top of mshare V3, which is
> based on mm-new (2025-08-15).
>
> Yongting Lin (8):
>   mshare: Add selftests
>   mshare: selftests: Adding config fragment
>   mshare: selftests: Add some helper function for mshare filesystem
>   mshare: selftests: Add test case shared memory
>   mshare: selftests: Add test case ioctl unmap
>   mshare: selftests: Add some helper functions for reading and
>     controlling cgroup
>   mshare: selftests: Add test case to demostrate the swaping of mshare
>     memory
>   mshare: selftests: Add test case to demostrate that mshare doesn't
>     support THP
>
>  tools/testing/selftests/mshare/.gitignore |   3 +
>  tools/testing/selftests/mshare/Makefile   |   7 +
>  tools/testing/selftests/mshare/basic.c    | 108 ++++++++++
>  tools/testing/selftests/mshare/config     |   1 +
>  tools/testing/selftests/mshare/memory.c   |  82 +++++++
>  tools/testing/selftests/mshare/util.c     | 251 ++++++++++++++++++++++
>  6 files changed, 452 insertions(+)
>  create mode 100644 tools/testing/selftests/mshare/.gitignore
>  create mode 100644 tools/testing/selftests/mshare/Makefile
>  create mode 100644 tools/testing/selftests/mshare/basic.c
>  create mode 100644 tools/testing/selftests/mshare/config
>  create mode 100644 tools/testing/selftests/mshare/memory.c
>  create mode 100644 tools/testing/selftests/mshare/util.c
>
> --
> 2.20.1
>