On Mon, Sep 05, 2022 at 10:49:38AM +0200, Michal Hocko wrote:

This is really my main concern about this whole work. Not only it adds a
considerable maintenance burden to the core MM because

[citation needed]

it adds on top of
our existing allocator layers complexity but it would need to spread beyond
MM to be useful because it is usually outside of MM where leaks happen.

If you want the tracking to happen at a different level of the call stack, just
call _kmalloc() directly and call alloc_tag_add()/sub() yourself.