Re: missing madvise functionality

[Andrew Morton]

On Tue, 03 Apr 2007 17:00:09 -0400
Rik van Riel <riel@xxxxxxxxxx> wrote:

> Andrew Morton wrote:
> 
> > Oh.  I was assuming that we'd want to unmap these pages from pagetables and
> > mark then super-easily-reclaimable.  So a later touch would incur a minor
> > fault.
> > 
> > But you think that we should leave them mapped into pagetables so no such
> > fault occurs.
> 
> > Leaving the pages mapped into pagetables means that they are considerably
> > less likely to be reclaimed.
> 
> If we move the pages to a place where they are very likely to be
> reclaimed quickly (end of the inactive list, or a separate
> reclaim list) and clear the dirty and referenced lists, we can
> both reclaim the page easily *and* avoid the page fault penalty.
> 

ah, yes, you're right.  That part should work nicely.
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