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    SubjectRe: [RFC bpf-next 0/1] bpf: Add page cache iterator
    Hi Christian, thanks for taking a look.

    On Thu, Apr 08, 2021 at 09:51:17AM +0200, Christian Brauner wrote:
    > 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?

    I mean multiple containers running side by side on the same host.

    Thanks,
    Daniel

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