[PATCH 0/2] make VM_SOFTDIRTY a sticky VMA flag

[Lorenzo Stoakes <lorenzo.stoakes@oracle.com>]

Currently we set VM_SOFTDIRTY when a new mapping is set up (whether by
establishing a new VMA, or via merge) as implemented in __mmap_complete()
and do_brk_flags().

However, when performing a merge of existing mappings such as when
performing mprotect(), we may lose the VM_SOFTDIRTY flag.


Lorenzo Stoakes (2):
  mm: propagate VM_SOFTDIRTY on merge
  testing/selftests/mm: add soft-dirty merge self-test

 include/linux/mm.h                      | 23 ++++++-----
 tools/testing/selftests/mm/soft-dirty.c | 51 ++++++++++++++++++++++++-
 tools/testing/vma/vma_internal.h        | 23 ++++++-----
 3 files changed, 72 insertions(+), 25 deletions(-)

--
2.51.0