On Wed, 15 Jan 2025, Yang Shi wrote: > > > > I just thought of named anonymous VMA may help. We can give the private > > > /dev/zero mapping a name, for example, just "/dev/zero". However, > > > "[anon:/dev/zero]" will show up in smaps/maps. We can't keep the device > > > numbers and inode number either, but it seems it can tell the user this > > > mapping comes from /dev/zero, and it also explicitly tells us it is > > > specially treated by kernel. Hopefully setting anon_name is permitted. > > But then that'd require CONFIG_ANON_VMA_NAME unfortunately :( > > Yes. Add a counter for NULL pages in smaps? I.e. Null: 4 kB Both anonymous and file mappings could have NULL page references right?
