From: Jamie Lokier <jamie@shareable.org>
To: Rik van Riel <riel@surriel.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Andrew Morton <akpm@digeo.com>,
andrea@suse.de, mingo@elte.hu, hugh@veritas.com,
dmccr@us.ibm.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Bill Irwin <wli@holomorphy.com>
Subject: Re: subobj-rmap
Date: Sun, 6 Apr 2003 22:55:30 +0100 [thread overview]
Message-ID: <20030406215530.GC24710@mail.jlokier.co.uk> (raw)
In-Reply-To: <Pine.LNX.4.44.0304061737510.2296-100000@chimarrao.boston.redhat.com>
Rik van Riel wrote:
> I don't see how the data structure you describe
> would allow us to efficiently select the subset
> of VMAs for which:
>
> 1) the start address is smaller than the address we want
> and
> 2) the end address is larger than the address we want
Think about the data structures some text editors use to describe
special regions of the text. A common operation is to search for all
the special regions covering a particular cursor position.
Several data structures are available. I'm not aware of any that have
perfect behaviour in all corner cases.
It might be worth noting that these data structures are good at
determining the set of regions covering position X+1 having recently
calculated the set for position X. Perhaps that has relevance for
speeding up page scanning?
-- Jamie
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next prev parent reply other threads:[~2003-04-06 21:55 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-04 14:34 objrmap and vmtruncate Hugh Dickins
2003-04-04 16:14 ` William Lee Irwin III
2003-04-04 16:29 ` Hugh Dickins
2003-04-04 18:54 ` Andrew Morton
2003-04-04 21:43 ` Hugh Dickins
2003-04-04 21:45 ` Andrea Arcangeli
2003-04-04 21:58 ` Benjamin LaHaise
2003-04-04 23:07 ` Andrew Morton
2003-04-05 0:03 ` Andrea Arcangeli
2003-04-05 0:31 ` Andrew Morton
2003-04-05 1:31 ` Andrea Arcangeli
2003-04-05 1:52 ` Benjamin LaHaise
2003-04-05 2:22 ` Andrea Arcangeli
2003-04-05 10:01 ` Jamie Lokier
2003-04-05 10:11 ` William Lee Irwin III
2003-04-05 2:06 ` Andrew Morton
2003-04-05 2:24 ` Andrea Arcangeli
2003-04-05 2:13 ` Martin J. Bligh
2003-04-05 2:44 ` Andrea Arcangeli
2003-04-05 3:24 ` Andrew Morton
2003-04-05 12:06 ` Andrew Morton
2003-04-05 15:11 ` Martin J. Bligh
[not found] ` <20030405161758.1ee19bfa.akpm@digeo.com>
2003-04-06 0:17 ` Andrew Morton
2003-04-06 7:07 ` William Lee Irwin III
2003-04-05 16:30 ` Andrea Arcangeli
2003-04-05 19:01 ` Andrea Arcangeli
2003-04-05 20:14 ` Andrew Morton
2003-04-05 21:24 ` Andrew Morton
2003-04-05 22:06 ` Andrea Arcangeli
2003-04-05 22:31 ` Andrew Morton
2003-04-05 23:10 ` Andrea Arcangeli
2003-04-06 1:58 ` Andrew Morton
2003-04-06 14:47 ` Andrea Arcangeli
2003-04-06 21:35 ` William Lee Irwin III
2003-04-06 7:38 ` William Lee Irwin III
2003-04-06 14:51 ` Andrea Arcangeli
2003-04-06 12:37 ` Jamie Lokier
2003-04-06 13:12 ` William Lee Irwin III
2003-04-22 11:00 ` Ingo Molnar
2003-04-22 11:54 ` William Lee Irwin III
2003-04-22 14:31 ` Ingo Molnar
2003-04-22 14:56 ` William Lee Irwin III
2003-04-22 15:26 ` Ingo Molnar
2003-04-22 16:20 ` William Lee Irwin III
2003-04-22 16:57 ` Andrea Arcangeli
2003-04-22 17:21 ` William Lee Irwin III
2003-04-22 18:08 ` Andrea Arcangeli
2003-04-22 17:34 ` Ingo Molnar
2003-04-22 18:04 ` Benjamin LaHaise
2003-04-22 16:58 ` Martin J. Bligh
2003-04-22 12:37 ` Andrea Arcangeli
2003-04-22 13:20 ` William Lee Irwin III
2003-04-22 14:38 ` Martin J. Bligh
2003-04-22 15:10 ` William Lee Irwin III
2003-04-22 15:53 ` Martin J. Bligh
2003-04-22 14:52 ` Andrea Arcangeli
2003-04-22 14:29 ` Martin J. Bligh
2003-04-22 15:07 ` Ingo Molnar
2003-04-22 15:42 ` William Lee Irwin III
2003-04-22 15:55 ` Ingo Molnar
2003-04-22 16:58 ` William Lee Irwin III
2003-04-22 17:07 ` Ingo Molnar
2003-04-22 15:16 ` Andrea Arcangeli
2003-04-22 15:49 ` Ingo Molnar
2003-04-22 16:16 ` Martin J. Bligh
2003-04-22 17:24 ` Ingo Molnar
2003-04-22 17:45 ` John Bradford
2003-04-22 14:32 ` Martin J. Bligh
2003-04-22 15:09 ` Ingo Molnar
2003-04-05 21:34 ` Rik van Riel
2003-04-06 9:29 ` Benjamin LaHaise
2003-04-05 23:25 ` William Lee Irwin III
2003-04-05 23:57 ` Andrew Morton
2003-04-06 0:14 ` Andrea Arcangeli
2003-04-06 1:39 ` Andrew Morton
2003-04-06 2:13 ` William Lee Irwin III
2003-04-06 9:26 ` Benjamin LaHaise
2003-04-06 9:41 ` William Lee Irwin III
2003-04-06 9:54 ` William Lee Irwin III
2003-04-06 2:23 ` Martin J. Bligh
2003-04-06 3:55 ` Andrew Morton
2003-04-06 3:08 ` Martin J. Bligh
2003-04-06 7:42 ` William Lee Irwin III
2003-04-06 14:49 ` Alan Cox
2003-04-06 16:13 ` Martin J. Bligh
2003-04-06 21:34 ` subobj-rmap Martin J. Bligh
2003-04-06 21:42 ` subobj-rmap Rik van Riel
2003-04-06 21:55 ` Jamie Lokier [this message]
2003-04-06 22:39 ` subobj-rmap William Lee Irwin III
2003-04-06 22:03 ` subobj-rmap Martin J. Bligh
2003-04-06 22:06 ` subobj-rmap Martin J. Bligh
2003-04-06 22:15 ` subobj-rmap Andrea Arcangeli
2003-04-06 22:25 ` subobj-rmap Martin J. Bligh
2003-04-07 21:25 ` subobj-rmap Andrea Arcangeli
2003-04-06 23:06 ` subobj-rmap Jamie Lokier
2003-04-06 23:26 ` subobj-rmap Martin J. Bligh
2003-04-05 3:45 ` objrmap and vmtruncate Martin J. Bligh
2003-04-05 3:59 ` Rik van Riel
2003-04-05 4:10 ` William Lee Irwin III
2003-04-05 4:49 ` Martin J. Bligh
2003-04-05 13:31 ` Rik van Riel
2003-04-05 4:52 ` Martin J. Bligh
2003-04-05 3:22 ` Andrew Morton
2003-04-05 3:35 ` Martin J. Bligh
2003-04-05 3:53 ` Rik van Riel
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