From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: Joseph A Knapka <jknapka@earthlink.net>, linux-mm@kvack.org
Subject: Re: Why *not* rmap, anyway?
Date: Sun, 21 Apr 2002 17:23:54 -0700 [thread overview]
Message-ID: <3051330941.1019409833@[10.10.2.3]> (raw)
In-Reply-To: <3CC33CDF.7F48A5B3@earthlink.net>
> I was just reading Bill's reply regaring rmap, and it
> seems to me that rmap is the most obvious and clean
> way to handle unmapping pages. So now I wonder why
> it wasn't done that way from the beginning?
Because it costs something to maintain the reverse map.
If the cost exceeds the benefit, it's not worth it. That's
why a bunch of us are working on bringing the cost down.
At the moment the cost is especially high on larger machines,
but we're getting there ... quickly ;-)
Martin.
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next prev parent reply other threads:[~2002-04-22 0:23 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-21 22:27 Joseph A Knapka
2002-04-22 0:23 ` Martin J. Bligh [this message]
2002-04-22 2:13 ` Joseph A Knapka
2002-04-22 5:46 ` Martin J. Bligh
2002-04-23 22:40 ` Christian Smith
2002-04-24 0:46 ` Rik van Riel
2002-04-24 10:50 ` Christian Smith
2002-04-24 14:20 ` Rik van Riel
2002-04-24 14:37 ` Momchil Velikov
2002-04-24 14:52 ` Rik van Riel
2002-04-24 15:16 ` Momchil Velikov
2002-04-24 18:31 ` William Lee Irwin III
2002-04-25 15:19 ` Christian Smith
2002-05-05 19:04 ` Daniel Phillips
2002-05-07 18:37 ` Christian Smith
2002-05-07 19:23 ` Rik van Riel
2002-05-07 19:25 ` William Lee Irwin III
2002-05-07 19:47 ` Daniel Phillips
2002-05-07 19:50 ` William Lee Irwin III
2002-05-07 23:02 ` Daniel Phillips
2002-05-08 0:08 ` William Lee Irwin III
2002-05-08 5:08 ` Andrew Morton
2002-05-08 7:59 ` Momchil Velikov
2002-05-08 14:33 ` Daniel Phillips
2002-05-08 14:43 ` Rik van Riel
2002-05-08 16:06 ` Daniel Phillips
2002-05-08 16:10 ` Rik van Riel
2002-05-07 19:49 ` Rik van Riel
2002-05-07 19:53 ` William Lee Irwin III
2002-05-07 19:43 ` Daniel Phillips
2002-05-07 19:51 ` Rik van Riel
2002-05-07 23:11 ` Daniel Phillips
2002-05-07 21:21 ` William Lee Irwin III
2002-05-07 23:15 ` Daniel Phillips
2002-05-07 19:37 ` Daniel Phillips
2002-05-07 19:47 ` William Lee Irwin III
2002-05-05 18:38 ` Daniel Phillips
2002-05-05 22:23 ` Rik van Riel
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