[lq9AJ8yrfs]

I think you're on to something, though it's optimistic to count on app devs to specify a novel platform-specific flag. "Don't break user-space" seems like it's in contest here.

Maybe if you could taint a process (or perhaps the inode and/or path instead) so that its and its children's opens get the new o_atime flag by default, so that systemd or whatever could set it for legacy processes (or files/paths) that need it.

Then distros or SRE's could put up with it without nagging all the SWEs about linuxisms. Some of whom may not know or care their code runs on linux.