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From: William Lee Irwin III <wli@holomorphy.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: Andrea Arcangeli <andrea@suse.de>, Ingo Molnar <mingo@redhat.com>,
	Andrew Morton <akpm@digeo.com>,
	mingo@elte.hu, hugh@veritas.com, dmccr@us.ibm.com,
	Linus Torvalds <torvalds@transmeta.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: objrmap and vmtruncate
Date: Tue, 22 Apr 2003 08:10:54 -0700	[thread overview]
Message-ID: <20030422151054.GH8978@holomorphy.com> (raw)
In-Reply-To: <171790000.1051022316@[10.10.2.4]>

On Tue, Apr 22, 2003 at 07:38:37AM -0700, Martin J. Bligh wrote:
> where the list of address_ranges is sorted by start address. This is
> intended to make use of the real-world case that many things (like shared
> libs) map the same exact address ranges over and over again (ie something
> like 3 ranges, but hundreds or thousands of mappings).

I'd have to see an empirical demonstration or some previously published
analysis (or previously published empirical demonstration) to believe
this does as it should.

Not to slight the originator, but it is a technique without an a priori
time (or possibly space either) guarantee, so the trials are warranted.

I'm overstating the argument because it's hard to make it sound slight;
it's very plausible something like this could resolve the time issue.


-- wli
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  reply	other threads:[~2003-04-22 15:10 UTC|newest]

Thread overview: 105+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-04 14:34 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 [this message]
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                             ` subobj-rmap Jamie Lokier
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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