From: Jamie Lokier <jamie@shareable.org>
To: Andrea Arcangeli <andrea@suse.de>
Cc: William Lee Irwin III <wli@holomorphy.com>,
"Martin J. Bligh" <mbligh@aracnet.com>,
Mel Gorman <mel@csn.ul.ie>,
Linux Memory Management List <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: What to expect with the 2.6 VM
Date: Fri, 4 Jul 2003 02:33:45 +0100 [thread overview]
Message-ID: <20030704013345.GA18928@mail.jlokier.co.uk> (raw)
In-Reply-To: <20030704004641.GR23578@dualathlon.random>
Andrea Arcangeli wrote:
> so you agree it'd better be a separate syscall
Per-page protections might be workable just through mremap(). As you
say, it's just a matter of appropriate bits in the swap entry. To
userspace it is a transparent performance improvement.
Unfortunately without an appropriate bit in the pte too, that
restricts per-page protections to work only with shared mappings, or
anon mappings which have not been forked, due to the lack of COW. It
would still be a good optimisation, although it would be a shame if,
say, a GC implementation of malloc et al. (eg. Boehm's allocator)
would not be transparent over fork().
-- Jamie
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next prev parent reply other threads:[~2003-07-04 1:33 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
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 [this message]
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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