Re: [RFC bpf-next 0/1] bpf: Add page cache iterator

[Christian Brauner]

On Wed, Apr 07, 2021 at 02:46:10PM -0700, Daniel Xu wrote:
> There currently does not exist a way to answer the question: "What is in
> the page cache?". There are various heuristics and counters but nothing
> that can tell you anything like:
> 
>   * 3M from /home/dxu/foo.txt
>   * 5K from ...
>   * etc.
> 
> The answer to the question is particularly useful in the stacked
> container world. Stacked containers implies multiple containers are run
> on the same physical host. Memory is precious resource on some (if not

Just to clarify: what are "stacked containers"? Do you mean nested
containers, i.e. containers running within containers?

Christian