From: ebiederm@xmission.com (Eric W. Biederman)
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Daniel Phillips <phillips@bonn-fries.net>,
Rob Fuller <rfuller@nsisoftware.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: broken VM in 2.4.10-pre9
Date: 19 Sep 2001 16:26:40 -0600 [thread overview]
Message-ID: <m166aeg6lb.fsf@frodo.biederman.org> (raw)
In-Reply-To: <E15jpRy-0003yt-00@the-village.bc.nu>
Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> Much of this goes away if you get rid of both the swap and anonymous page
> special cases. Back anonymous pages with the "whoops everything I write here
> vanishes mysteriously" file system and swap with a swapfs
Essentially. Though that is just the strategy it doesn't cut to the heart of the
problems that need to be addressed. The trickiest part is to allocate persistent
id's to the pages that don't require us to fragment the VMA's.
> Reverse mappings make linear aging easier to do but are not critical (we
> can walk all physical pages via the page map array).
Agreed.
What I find interesting about the 2.4.x VM is that most of the large
problems people have seen were not stupid designs mistakes in the VM
but small interaction glitches, between various pieces of code.
Eric
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next prev parent reply other threads:[~2001-09-19 22:26 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
2001-09-19 21:03 ` Eric W. Biederman
2001-09-19 22:04 ` Alan Cox
2001-09-19 22:26 ` Eric W. Biederman [this message]
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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