Hi, These patches enable support for UFFDIO_ZEROPAGE for shared memory.
The first two patches are not strictly related to userfaultfd, they are just minor refactoring to reduce amount of code duplication. Mike Rapoport (7): shmem: shmem_charge: verify max_block is not exceeded before inode update shmem: introduce shmem_inode_acct_block userfaultfd: shmem: add shmem_mfill_zeropage_pte for userfaultfd support userfaultfd: mcopy_atomic: introduce mfill_atomic_pte helper userfaultfd: shmem: wire up shmem_mfill_zeropage_pte userfaultfd: report UFFDIO_ZEROPAGE as available for shmem VMAs userfaultfd: selftest: enable testing of UFFDIO_ZEROPAGE for shmem fs/userfaultfd.c | 10 +- include/linux/shmem_fs.h | 6 ++ mm/shmem.c | 167 +++++++++++++++++-------------- mm/userfaultfd.c | 48 ++++++--- tools/testing/selftests/vm/userfaultfd.c | 2 +- 5 files changed, 136 insertions(+), 97 deletions(-) -- 2.7.4
