From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Rob Fuller <rfuller@nsisoftware.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: broken VM in 2.4.10-pre9
Date: Wed, 19 Sep 2001 20:45:55 +0100 (BST) [thread overview]
Message-ID: <E15jnIB-0003gh-00@the-village.bc.nu> (raw)
In-Reply-To: <20010919093828Z17304-2759+92@humbolt.nl.linux.org> from "Daniel Phillips" at Sep 19, 2001 11:45:44 AM
> On September 17, 2001 06:03 pm, Eric W. Biederman wrote:
> > In linux we have avoided reverse maps (unlike the BSD's) which tends
> > to make the common case fast at the expense of making it more
> > difficult to handle times when the VM system is under extreme load and
> > we are swapping etc.
>
> What do you suppose is the cost of the reverse map? I get the impression you
> think it's more expensive than it is.
We can keep the typical page table cost lower than now (including reverse
maps) just by doing some common sense small cleanups to get the page struct
down to 48 bytes on x86
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next prev parent reply other threads:[~2001-09-19 19:45 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-17 15:40 Rob Fuller
2001-09-17 16:03 ` Eric W. Biederman
2001-09-19 9:45 ` Daniel Phillips
2001-09-19 19:45 ` Alan Cox [this message]
2001-09-19 21:03 ` Eric W. Biederman
2001-09-19 22:04 ` Alan Cox
2001-09-19 22:26 ` Eric W. Biederman
2001-09-19 23:05 ` Rik van Riel
2001-09-20 11:28 ` Daniel Phillips
2001-09-20 12:06 ` Rik van Riel
2001-09-21 8:13 ` Daniel Phillips
2001-09-21 12:10 ` Rik van Riel
2001-09-21 15:27 ` Jan Harkes
2001-09-22 7:09 ` Daniel Phillips
2001-09-25 11:04 ` Mike Fedyk
2001-09-20 12:57 ` Alan Cox
2001-09-20 13:40 ` Daniel Phillips
2001-09-24 22:50 ` Pavel Machek
2001-09-26 18:22 ` Marcelo Tosatti
2001-09-26 23:44 ` Pavel Machek
2001-09-27 13:52 ` Eric W. Biederman
2001-10-01 11:37 ` Marcelo Tosatti
2001-09-19 23:00 ` Rik van Riel
2001-09-21 8:23 ` Eric W. Biederman
2001-09-21 12:01 ` Rik van Riel
2001-09-22 2:14 ` Alexander Viro
2001-09-22 3:09 ` Rik van Riel
2001-09-19 21:37 ` Eric W. Biederman
2001-09-19 21:55 ` David S. Miller
2001-09-20 13:02 ` Rik van Riel
-- strict thread matches above, loose matches on Subject: below --
2001-09-19 22:15 Rob Fuller
2001-09-19 22:21 ` David S. Miller
2001-09-19 22:30 ` Alan Cox
2001-09-19 22:48 ` Eric W. Biederman
2001-09-19 22:51 ` Bryan O'Sullivan
[not found] <Pine.LNX.4.33L.0109161330000.9536-100000@imladris.rielhome.conectiva>
2001-09-17 8:06 ` Eric W. Biederman
2001-09-17 12:12 ` Rik van Riel
2001-09-17 15:45 ` Eric W. Biederman
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