From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Daniel Phillips <phillips@arcor.de>, Mel Gorman <mel@csn.ul.ie>,
Linux Memory Management List <linux-mm@kvack.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: What to expect with the 2.6 VM
Date: Tue, 01 Jul 2003 13:10:39 -0700 [thread overview]
Message-ID: <445820000.1057090239@flay> (raw)
In-Reply-To: <200306301943.04326.phillips@arcor.de>
>> In 2.4, Page Table Entries (PTEs) must be allocated from ZONE_ NORMAL as
>> the kernel needs to address them directly for page table traversal. In a
>> system with many tasks or with large mapped memory regions, this can
>> place significant pressure on ZONE_ NORMAL so 2.6 has the option of
>> allocating PTEs from high memory.
>
> You probably ought to mention that this is only needed by 32 bit architectures
> with silly amounts of memory installed.
Actually, it has more to do with the number of processes sharing data,
than the amount of memory in the machine. And that's only because we
insist on making duplicates of identical pagetables all over the place ...
M.
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next prev parent reply other threads:[~2003-07-01 20:10 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-01 1:39 Mel Gorman
2003-06-30 17:43 ` Daniel Phillips
2003-07-01 20:10 ` Martin J. Bligh [this message]
2003-07-01 21:41 ` Mel Gorman
2003-07-01 21:51 ` Davide Libenzi
2003-07-01 21:58 ` Martin J. Bligh
2003-07-02 9:01 ` Mel Gorman
2003-07-01 2:25 ` Andrea Arcangeli
2003-07-01 3:02 ` Andrew Morton
2003-07-01 3:22 ` Andrea Arcangeli
2003-07-01 3:25 ` Andrea Arcangeli
2003-07-01 3:29 ` Rik van Riel
2003-07-01 4:04 ` Andrea Arcangeli
2003-07-01 11:01 ` Hugh Dickins
2003-07-01 3:25 ` William Lee Irwin III
2003-07-01 4:39 ` Andrea Arcangeli
2003-07-01 6:33 ` William Lee Irwin III
2003-07-01 7:49 ` Andrea Arcangeli
2003-07-01 8:59 ` William Lee Irwin III
2003-07-01 9:27 ` Andrea Arcangeli
2003-07-01 14:24 ` Martin J. Bligh
2003-07-01 16:22 ` William Lee Irwin III
2003-07-01 17:54 ` Martin J. Bligh
2003-07-02 3:04 ` Andrea Arcangeli
2003-07-01 14:42 ` Martin J. Bligh
2003-07-01 21:45 ` Mel Gorman
2003-07-01 22:06 ` Martin J. Bligh
2003-07-01 21:46 ` Mel Gorman
2003-07-02 3:08 ` Andrea Arcangeli
2003-07-02 15:57 ` Mel Gorman
2003-07-02 17:11 ` Andrea Arcangeli
2003-07-02 17:10 ` Martin J. Bligh
2003-07-02 17:47 ` Andrea Arcangeli
2003-07-02 17:52 ` Martin J. Bligh
2003-07-02 18:13 ` Andrea Arcangeli
2003-07-02 18:05 ` Rik van Riel
2003-07-02 20:05 ` Martin J. Bligh
2003-07-02 21:40 ` William Lee Irwin III
2003-07-02 21:48 ` Martin J. Bligh
2003-07-02 22:14 ` William Lee Irwin III
2003-07-02 22:02 ` Andrea Arcangeli
2003-07-02 22:15 ` William Lee Irwin III
2003-07-02 22:26 ` Andrea Arcangeli
2003-07-02 23:11 ` William Lee Irwin III
2003-07-02 23:30 ` Andrea Arcangeli
2003-07-02 23:55 ` William Lee Irwin III
2003-07-03 11:31 ` Andrea Arcangeli
2003-07-03 11:46 ` William Lee Irwin III
2003-07-03 12:58 ` Andrea Arcangeli
2003-07-03 13:06 ` Rik van Riel
2003-07-03 13:48 ` Andrea Arcangeli
2003-07-03 18:53 ` William Lee Irwin III
2003-07-03 19:27 ` Andrea Arcangeli
2003-07-03 19:32 ` Rik van Riel
2003-07-03 20:16 ` William Lee Irwin III
2003-07-04 0:40 ` Andrea Arcangeli
2003-07-04 1:46 ` William Lee Irwin III
2003-07-04 2:34 ` Andrea Arcangeli
2003-07-04 4:10 ` William Lee Irwin III
2003-07-04 5:54 ` Andrea Arcangeli
2003-07-04 8:15 ` William Lee Irwin III
2003-07-04 23:44 ` Andrea Arcangeli
2003-07-05 0:05 ` William Lee Irwin III
2003-07-05 0:08 ` Andrea Arcangeli
2003-07-03 18:48 ` Jamie Lokier
2003-07-03 18:54 ` William Lee Irwin III
2003-07-03 19:33 ` Andrea Arcangeli
2003-07-03 22:21 ` William Lee Irwin III
2003-07-04 0:46 ` Andrea Arcangeli
2003-07-04 1:33 ` Jamie Lokier
2003-07-04 1:36 ` William Lee Irwin III
2003-07-03 19:06 ` Andrew Morton
2003-07-03 19:34 ` Andrea Arcangeli
2003-07-02 18:07 ` Rik van Riel
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