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

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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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