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SubjectRe: mmap vs fs cache
Howard Chu wrote:
> 2 questions:
> why is there data in the FS cache that isn't owned by (the mmap of) the
> process that caused it to be paged in in the first place?
> is there a tunable knob to discourage the page cache from stealing from the
> process?

This Unmapped page cache control sounds like
it might have been helpful here. I.e., having a way to prioritize so that
unmapped cache pages get reclaimed in preference to mapped pages could help.
Though I still don't understand why these pages in the cache aren't mapped in
the first place.

-- Howard Chu
CTO, Symas Corp.
Director, Highland Sun
Chief Architect, OpenLDAP

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