From: Daniel Phillips <phillips@bonn-fries.net>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
Andrew Morton <akpm@zip.com.au>, <linux-kernel@vger.kernel.org>,
Ben LaHaise <bcrl@redhat.com>,
Mike Galbraith <mikeg@wen-online.de>
Subject: Re: [RFC] Optimization for use-once pages
Date: Wed, 25 Jul 2001 19:46:01 +0200 [thread overview]
Message-ID: <0107251946010C.00907@starship> (raw)
In-Reply-To: <Pine.LNX.4.33L.0107251340550.20326-100000@duckman.distro.conectiva>
In-Reply-To: <Pine.LNX.4.33L.0107251340550.20326-100000@duckman.distro.conectiva>
On Wednesday 25 July 2001 18:41, Rik van Riel wrote:
> On Wed, 25 Jul 2001, Daniel Phillips wrote:
> > On Wednesday 25 July 2001 08:33, Marcelo Tosatti wrote:
> > > Now I'm not sure why directly adding swapcache pages to the
> > > inactive dirty lits with 0 zero age improves things.
> >
> > Because it moves the page rapidly down the inactive queue towards
> > the ->writepage instead of leaving it floating around on the active
> > ring waiting to be noticed. We already know we want to evict that
> > page,
>
> We don't.
>
> The page gets unmapped and added to the swap cache the first
> time it wasn't referenced by the process.
>
> This is before any page aging is done.
True, it's more accurate to say that we already know we want to *try*
evicting that page. A wrong guess should not make it all the way down
the inactive queue.
--
Daniel
next prev parent reply other threads:[~2001-07-25 17:41 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0107251802300B.00907@starship>
2001-07-25 16:41 ` [RFC] Optimization for use-once pages Rik van Riel
2001-07-25 17:46 ` Daniel Phillips [this message]
2001-07-26 8:36 ` Eric W. Biederman
2001-07-26 12:06 ` Daniel Phillips
2001-07-26 10:38 ` Marcelo Tosatti
2001-07-26 12:17 ` Daniel Phillips
2001-07-26 3:27 Ed Tomlinson
[not found] <010301c11463$1ee00440$294b82ce@connecttech.com>
2001-07-24 17:07 ` Rik van Riel
2001-07-24 17:42 ` Stuart MacDonald
2001-07-24 17:51 ` Rik van Riel
2001-07-24 18:09 ` Stuart MacDonald
2001-07-24 18:15 ` Mike Castle
2001-07-24 18:21 ` Rik van Riel
2001-07-24 17:44 ` Mike Castle
2001-07-24 17:52 ` Rik van Riel
-- strict thread matches above, loose matches on Subject: below --
2001-07-24 3:47 Daniel Phillips
2001-07-24 12:38 ` jlnance
2001-07-24 16:56 ` Rik van Riel
2001-07-25 0:04 ` Daniel Phillips
2001-07-25 0:43 ` Anton Altaparmakov
2001-07-25 1:30 ` Daniel Phillips
2001-07-25 21:18 ` Steve Lord
2001-07-24 16:48 ` Linus Torvalds
2001-07-24 17:04 ` Rik van Riel
2001-07-24 18:14 ` Daniel Phillips
2001-07-24 18:15 ` Rik van Riel
2001-07-24 20:24 ` Patrick Dreker
2001-07-24 20:32 ` Rik van Riel
2001-07-24 22:16 ` Patrick Dreker
2001-07-24 22:25 ` Rik van Riel
2001-07-25 0:27 ` Linus Torvalds
2001-07-25 8:20 ` Patrick Dreker
2001-07-25 12:57 ` Martin Devera
2001-07-25 14:16 ` Daniel Phillips
2001-07-24 20:33 ` Linus Torvalds
2001-07-25 1:25 ` Daniel Phillips
2001-07-25 0:18 ` Daniel Phillips
2001-07-24 20:27 ` Marcelo Tosatti
2001-07-24 22:05 ` Rik van Riel
2001-07-24 20:53 ` Marcelo Tosatti
2001-07-24 22:27 ` Rik van Riel
2001-07-24 23:09 ` Daniel Phillips
2001-07-24 19:35 ` Rob Landley
2001-07-25 6:10 ` Marcelo Tosatti
2001-07-25 8:32 ` Eric W. Biederman
2001-07-25 12:53 ` Daniel Phillips
2001-07-25 16:05 ` Eric W. Biederman
2001-07-25 12:57 ` Daniel Phillips
2001-07-25 5:12 ` Andrew Morton
2001-07-25 6:33 ` Marcelo Tosatti
2001-07-30 18:09 ` Marcelo Tosatti
2001-07-24 22:41 ` Daniel Phillips
2001-07-24 22:22 ` Daniel Phillips
2001-07-25 2:31 ` Marcelo Tosatti
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