RE: [PATCH 4/6] fs/proc/page.c: introduce /proc/kpagecache interface

[Luck, Tony]

> Usage is simple: 1) write a file path to be scanned into the interface,
> and 2) read 64-bit entries, each of which is associated with the page on
> each page index.

Do we have other interfaces that work like that?  I suppose this is file is only open
to "root", so it may be safe to assume that applications using this won't stomp on
each other.

-Tony
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