Re: missing madvise functionality

Rik van Riel
2007-04-04T14:55:25Z

Hugh Dickins wrote:

> (I didn't understand how Rik would achieve his point 5, _no_ lock
> contention while repeatedly re-marking these pages, but never mind.)

The CPU marks them accessed&dirty when they are reused.

The VM only moves the reused pages back to the active list
on memory pressure. This means that when the system is
not under memory pressure, the same page can simply stay
PG_lazyfree for multiple malloc/free rounds.

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