Hi, Recently, Mike Kravetz added hugetlbfs support to memfd. However, he didn't add sealing support. One of the reasons to use memfd is to have shared memory sealing when doing IPC or sharing memory with another process with some extra safety. qemu uses shared memory & hugetables with vhost-user (used by dpdk), so it is reasonable to use memfd now instead for convenience and security reasons.
Thanks! RFC->v1: - split rfc patch, after early review feedback - added patch for memfd-test changes - fix build with hugetlbfs disabled - small code and commit messages improvements Marc-André Lureau (6): shmem: unexport shmem_add_seals()/shmem_get_seals() shmem: rename functions that are memfd-related hugetlb: expose hugetlbfs_inode_info in header hugetlbfs: implement memfd sealing shmem: add sealing support to hugetlb-backed memfd memfd-tests: test hugetlbfs sealing fs/fcntl.c | 2 +- fs/hugetlbfs/inode.c | 39 +++++--- include/linux/hugetlb.h | 11 +++ include/linux/shmem_fs.h | 6 +- mm/shmem.c | 59 +++++++----- tools/testing/selftests/memfd/memfd_test.c | 150 +++-------------------------- 6 files changed, 89 insertions(+), 178 deletions(-) -- 2.15.0.rc0.40.gaefcc5f6f
