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From: Daniel Phillips <phillips@bonn-fries.net>
To: Marcelo Tosatti <marcelo@conectiva.com.br>
Subject: Re: [RFC] Optimization for use-once pages
Date: Thu, 26 Jul 2001 14:17:58 +0200
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        Rik van Riel <riel@conectiva.com.br>, Andrew Morton <akpm@zip.com.au>,
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        Mike Galbraith <mikeg@wen-online.de>
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On Thursday 26 July 2001 12:38, Marcelo Tosatti wrote:
> On Thu, 26 Jul 2001, Daniel Phillips wrote:
> > There does seem to be a dangling thread here though - when a
> > process page is unmapped and added to swap cache in try_to_swap_out
> > then later faulted back in, I don't see where we "rescue" the page
> > from the inactive queue.  Maybe I'm just not looking hard enough.
>
> do_swap_page()->lookup_swap_cache()->__find_page_nolock()->SetPageRef
>erenced().
>
> The referenced bit will make page_launder/reclaim_page move the page
> to the active list.

Yes.  And there I set ->age to a known state (START_AGE), so everything 
seems to be in order.

--
Daniel
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