From: William Lee Irwin III <wli@holomorphy.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>, David Chinner <dgc@sgi.com>,
Zan Lynx <zlynx@acm.org>, Adrian Bunk <bunk@stusta.de>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm patch] i386: enable 4k stacks by default)
Date: Mon, 30 Apr 2007 12:09:52 -0700 [thread overview]
Message-ID: <20070430190952.GP31925@holomorphy.com> (raw)
In-Reply-To: <20070430181104.GB14739@infradead.org>
On Mon, Apr 30, 2007 at 10:43:10AM -0700, William Lee Irwin III wrote:
>> Add a config option to vmalloc() task stacks so that stack overflows are
>> detected without fail, and with a fatal failure mode at that.
On Mon, Apr 30, 2007 at 07:11:04PM +0100, Christoph Hellwig wrote:
> Whee, this sounds like a really helpful although costly debugging option.
If desired, I can redo it standalone.
It should be clear from the remainder of the series of debug patches
that it's readily extensible to IRQ stacks for similar purposes, as
IRQ stacks are similarly vmalloc()'d by later patches in the series.
The patch to make __pa() BUG() on vmallocspace addresses may also be
worthy of consideration in conjunction with vmalloc()'ing the stack.
That particular patch was suggested by freitag.
-- wli
next prev parent reply other threads:[~2007-04-30 19:09 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-28 19:19 [-mm patch] i386: enable 4k stacks by default Adrian Bunk
2007-04-28 21:18 ` Zan Lynx
2007-04-30 3:58 ` David Chinner
2007-04-30 8:17 ` Alan Cox
2007-04-30 10:26 ` Andi Kleen
2007-04-30 10:48 ` Christoph Hellwig
2007-04-30 12:13 ` Andi Kleen
2007-04-30 17:38 ` William Lee Irwin III
2007-04-30 17:40 ` [1/6] make stack size configurable (was: Re: [-mm patch] i386: enable 4k stacks by default) William Lee Irwin III
2007-04-30 18:10 ` Christoph Hellwig
2007-04-30 18:13 ` William Lee Irwin III
2007-04-30 18:25 ` Adrian Bunk
2007-04-30 18:32 ` William Lee Irwin III
2007-04-30 17:43 ` [2/6] add config option to vmalloc stacks " William Lee Irwin III
2007-04-30 18:11 ` Christoph Hellwig
2007-04-30 18:25 ` Jan Engelhardt
2007-04-30 19:09 ` William Lee Irwin III [this message]
2007-04-30 19:15 ` Christoph Hellwig
2007-04-30 19:23 ` Bill Irwin
2007-04-30 22:04 ` Bill Irwin
2007-05-01 22:36 ` Matt Mackall
2007-05-01 22:51 ` Bill Irwin
2007-05-01 23:07 ` Alan Cox
2007-05-01 23:23 ` Bill Irwin
2007-05-01 23:15 ` Matt Mackall
2007-05-01 23:27 ` Bill Irwin
2007-05-04 5:35 ` Joseph Fannin
2007-05-04 7:43 ` Bill Irwin
2007-04-30 17:44 ` [3/6] make IRQ stacks independently configurable " William Lee Irwin III
2007-04-30 18:11 ` Christoph Hellwig
2007-04-30 18:14 ` William Lee Irwin III
2007-04-30 17:45 ` [4/6] go BUG on vmallocspace in __pa() " William Lee Irwin III
2007-04-30 18:52 ` Andi Kleen
2007-04-30 18:58 ` William Lee Irwin III
2007-04-30 19:20 ` Alan Cox
2007-04-30 19:26 ` Bill Irwin
2007-05-02 22:31 ` [4/6] go BUG on vmallocspace in __pa() Jeremy Fitzhardinge
2007-05-02 22:48 ` Bill Irwin
2007-04-30 17:46 ` [5/6] dynamically allocate IRQ stacks (was: Re: [-mm patch] i386: enable 4k stacks by default) William Lee Irwin III
2007-04-30 19:49 ` Zwane Mwaikambo
2007-04-30 20:03 ` Bill Irwin
2007-04-30 20:07 ` Andi Kleen
2007-04-30 17:47 ` [6/6] arrange for a guard page on cpu 0's IRQ stack " William Lee Irwin III
2007-04-30 18:22 ` [-mm patch] i386: enable 4k stacks by default Jan Engelhardt
2007-04-30 18:35 ` William Lee Irwin III
2007-04-30 18:51 ` Andi Kleen
2007-04-30 8:55 ` Neil Brown
2007-04-30 8:59 ` Christoph Hellwig
2007-04-30 11:30 ` Jens Axboe
2007-04-30 23:24 ` Neil Brown
2007-05-01 8:01 ` Jens Axboe
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