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! v1->v2: after Mike review, - add "memfd-hugetlb:" prefix in memfd-test - run fuse test on hugetlb backend memory - rename function memfd_file_get_seals() -> memfd_file_seals_ptr() - update commit messages - added reviewed-by tags 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 (9): 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 memfd-test: add 'memfd-hugetlb:' prefix when testing hugetlbfs memfd-test: move common code to a shared unit memfd-test: run fuse test on hugetlb backend memory 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/Makefile | 5 + tools/testing/selftests/memfd/common.c | 45 ++++++ tools/testing/selftests/memfd/common.h | 9 ++ tools/testing/selftests/memfd/fuse_test.c | 36 +++-- tools/testing/selftests/memfd/memfd_test.c | 212 ++++--------------------- tools/testing/selftests/memfd/run_fuse_test.sh | 2 +- tools/testing/selftests/memfd/run_tests.sh | 1 + 12 files changed, 195 insertions(+), 232 deletions(-) create mode 100644 tools/testing/selftests/memfd/common.c create mode 100644 tools/testing/selftests/memfd/common.h -- 2.15.0.rc0.40.gaefcc5f6f -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
