From: Andrea Arcangeli <andrea@suse.de>
To: Dan Merillat <dan.merillat@gmail.com>
Cc: Eric Sandeen <sandeen@sandeen.net>,
Satyam Sharma <satyam.sharma@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Matt Mackall <mpm@selenic.com>,
Rene Herman <rene.herman@gmail.com>,
Ray Lee <ray-lk@madrabbit.org>, Bodo Eggert <7eggert@gmx.de>,
Jeremy Fitzhardinge <jeremy@goop.org>,
Jesper Juhl <jesper.juhl@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
William Lee Irwin III <wli@holomorphy.com>,
David Chinner <dgc@sgi.com>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?
Date: Wed, 1 Aug 2007 15:33:58 +0200 [thread overview]
Message-ID: <20070801133358.GD6910@v2.random> (raw)
In-Reply-To: <a56dfcf00708010111n4b862a11wf91fe9677ee46143@mail.gmail.com>
On Wed, Aug 01, 2007 at 04:11:23AM -0400, Dan Merillat wrote:
> How expensive would it be to allocate two , then use the MMU mark the
> second page unwritable? Hardware wise it should be possible, (for
Tweaking kernel ptes is prohibitive during clone() because that's
kernel memory and it would require a flush tlb all with IPIs that
won't scale (IPIs are really the blocker). Basically vmalloc already
does what you suggest with the gap page and yet we can't use it for
performance reasons. Kernel stack should be readable by any context to
allow sysrq+t kind of things, so I doubt it's feasible to do tricks to
avoid ipis.
next prev parent reply other threads:[~2007-08-01 13:34 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8FO1e-2jW-35@gated-at.bofh.it>
[not found] ` <8FYWD-2eS-7@gated-at.bofh.it>
[not found] ` <8GdsH-8dc-13@gated-at.bofh.it>
[not found] ` <8Ghmx-60z-17@gated-at.bofh.it>
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[not found] ` <8GkNo-2Vb-1@gated-at.bofh.it>
[not found] ` <8GtnN-7TG-23@gated-at.bofh.it>
[not found] ` <8GVjY-PL-25@gated-at.bofh.it>
2007-07-15 17:17 ` [PATCH][RFC] 4K stacks default, not a debug thing any more...? Bodo Eggert
2007-07-15 17:35 ` Arjan van de Ven
2007-07-15 18:32 ` Måns Rullgård
2007-07-15 17:46 ` Rene Herman
2007-07-16 13:43 ` Bodo Eggert
2007-07-16 22:28 ` Rene Herman
2007-07-16 22:37 ` Ray Lee
2007-07-16 22:54 ` Alan Cox
2007-07-16 22:53 ` Ray Lee
2007-07-16 23:05 ` Rene Herman
2007-07-16 23:15 ` Ray Lee
2007-07-18 0:14 ` Alan Cox
2007-07-18 6:39 ` Ray Lee
2007-07-17 17:01 ` William Lee Irwin III
2007-07-17 23:39 ` Jesper Juhl
2007-07-18 0:22 ` Rene Herman
2007-07-16 22:54 ` Jesper Juhl
2007-07-16 23:01 ` Rene Herman
2007-07-16 23:42 ` Bodo Eggert
2007-07-16 23:51 ` Jesper Juhl
2007-07-19 19:34 ` Denis Vlasenko
2007-07-19 20:04 ` Bodo Eggert
2007-07-16 22:55 ` Rene Herman
2007-07-16 23:07 ` Matt Mackall
2007-07-16 23:12 ` Rene Herman
2007-07-16 23:27 ` Matt Mackall
2007-07-16 23:32 ` Rene Herman
2007-07-18 2:38 ` Rene Herman
2007-07-18 16:54 ` Matt Mackall
2007-07-18 17:17 ` Rene Herman
2007-07-19 0:15 ` Andrea Arcangeli
2007-07-19 0:39 ` Alan Cox
2007-07-19 1:33 ` Andrea Arcangeli
2007-07-19 1:37 ` Matt Mackall
2007-07-19 1:56 ` Rene Herman
2007-07-19 11:24 ` Andrea Arcangeli
2007-07-19 11:44 ` Alan Cox
2007-07-27 13:02 ` Eric Sandeen
2007-07-27 17:38 ` Alan Cox
2007-07-27 18:31 ` Satyam Sharma
2007-08-01 3:53 ` Eric Sandeen
2007-08-01 8:11 ` Dan Merillat
2007-08-01 10:04 ` Neil Brown
2007-08-10 4:51 ` Dan Merillat
2007-08-10 4:59 ` Neil Brown
2007-08-01 13:33 ` Andrea Arcangeli [this message]
2007-08-01 15:44 ` Alan Cox
2007-08-10 1:03 ` Dan Merillat
2007-07-19 9:23 ` Alan Cox
2007-07-19 10:52 ` Andrea Arcangeli
2007-07-27 13:03 ` Eric Sandeen
2007-07-27 17:18 ` Krzysztof Halasa
2007-07-19 0:41 ` Matt Mackall
2007-07-19 0:48 ` Rene Herman
2007-07-19 1:28 ` Matt Mackall
2007-07-16 23:13 ` Ray Lee
2007-07-16 23:22 ` Rene Herman
2007-07-16 23:35 ` Jesper Juhl
2007-07-16 23:40 ` Ray Lee
2007-07-17 0:57 ` Rene Herman
2007-07-17 16:14 ` Shawn Bohrer
2007-07-17 16:52 ` Rene Herman
2007-07-17 17:45 ` Zan Lynx
2007-07-18 0:16 ` Alan Cox
2007-07-16 23:45 ` Bodo Eggert
2007-07-17 0:28 ` Rene Herman
2007-07-17 10:06 ` Bodo Eggert
2007-07-17 14:38 ` Rene Herman
2007-07-17 23:19 ` Bodo Eggert
2007-07-17 23:29 ` Arjan van de Ven
2007-07-19 17:20 ` Bodo Eggert
2007-07-17 23:57 ` Rene Herman
2007-07-19 17:05 ` Bodo Eggert
2007-07-16 23:26 ` utz lehmann
2007-07-16 23:39 ` Måns Rullgård
2007-07-17 1:00 ` Rene Herman
2007-07-17 14:45 ` John Stoffel
2007-07-17 23:46 ` utz lehmann
[not found] <8HfVl-71J-15@gated-at.bofh.it>
[not found] ` <8Hgoq-7Cd-21@gated-at.bofh.it>
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[not found] ` <8HI1k-Dn-25@gated-at.bofh.it>
[not found] ` <8HIb2-PD-11@gated-at.bofh.it>
[not found] ` <8HIun-1e7-33@gated-at.bofh.it>
[not found] ` <8HJA3-2Nq-9@gated-at.bofh.it>
[not found] ` <8HXWo-8t2-17@gated-at.bofh.it>
[not found] ` <8HYzd-PZ-25@gated-at.bofh.it>
[not found] ` <8HZlt-27o-7@gated-at.bofh.it>
2007-07-18 8:37 ` Nick Craig-Wood
[not found] ` <8HHRD-rK-19@gated-at.bofh.it>
[not found] ` <8HI1j-Dn-21@gated-at.bofh.it>
[not found] ` <8HIb2-PD-5@gated-at.bofh.it>
[not found] ` <8IrUr-4SZ-9@gated-at.bofh.it>
[not found] ` <8IsdO-5g4-7@gated-at.bofh.it>
[not found] ` <8It9R-6Eb-3@gated-at.bofh.it>
[not found] ` <8IAkZ-WW-1@gated-at.bofh.it>
2007-07-19 13:37 ` Bodo Eggert
[not found] <8IdHQ-7Pm-25@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-27@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-29@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-31@gated-at.bofh.it>
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[not found] ` <8IdHQ-7Pm-43@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-45@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-47@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-49@gated-at.bofh.it>
[not found] ` <8IdHQ-7Pm-23@gated-at.bofh.it>
2007-07-18 11:09 ` Nick Craig-Wood
2007-07-11 17:16 Jesper Juhl
2007-07-11 17:54 ` Zan Lynx
2007-07-11 20:05 ` Daniel Phillips
2007-07-11 22:09 ` Neil Brown
2007-07-12 3:15 ` Daniel Phillips
2007-07-12 4:16 ` David Chinner
2007-07-12 4:59 ` Ray Lee
2007-07-12 20:24 ` Jesper Juhl
2007-07-13 0:34 ` Jeremy Fitzhardinge
2007-07-13 2:25 ` Jesper Juhl
2007-07-13 4:14 ` Jeremy Fitzhardinge
2007-07-13 9:19 ` Jan Engelhardt
2007-07-13 13:20 ` Rene Herman
2007-07-14 19:17 ` Matt Mackall
2007-07-14 22:19 ` Rene Herman
2007-07-16 23:38 ` Matt Mackall
2007-07-17 13:46 ` Rene Herman
2007-07-18 17:19 ` Phillip Susi
2007-07-18 17:32 ` Rene Herman
2007-07-18 17:32 ` Alan Cox
2007-07-18 17:33 ` Phillip Susi
2007-07-14 19:42 ` Matt Mackall
2007-07-12 6:08 ` Jeremy Fitzhardinge
2007-07-12 6:37 ` David Chinner
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