On Tue, May 28, 2019 at 1:14 AM Minchan Kim <minchan@xxxxxxxxxx> wrote: > if we went with the per vma fd approach then you would get this > > feature automatically because map_files would refer to file backed > > mappings while map_anon could refer only to anonymous mappings. > > The reason to add such filter option is to avoid the parsing overhead > so map_anon wouldn't be helpful. Without chiming on whether the filter option is a good idea, I'd like to suggest that providing an efficient binary interfaces for pulling memory map information out of processes. Some single-system-call method for retrieving a binary snapshot of a process's address space complete with attributes (selectable, like statx?) for each VMA would reduce complexity and increase performance in a variety of areas, e.g., Android memory map debugging commands.
