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msync & MS_INVALIDATE question




The man page I have for msync(MS_INVALIDATE) says it should invalidate
all other mappings. I.e. get all other mappings.

The implementation does something quite different, that is related to
only the present mapping.

Was this a pure documentation bug.  Was MS_INVALIDATE not implemented
correctly because of no reverse maps?  Or is something else going on
here?

I know in the context of MAP_SHARED invalidating other mappings seems
like a reasonable proposition.

Eric