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Date: Wed, 18 Jul 2007 01:39:09 +0200
From: "Jesper Juhl" <jesper.juhl@gmail.com>
To: "William Lee Irwin III" <wli@holomorphy.com>
Subject: Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?
Cc: "Alan Cox" <alan@lxorguk.ukuu.org.uk>, "Ray Lee" <ray-lk@madrabbit.org>,
       "Rene Herman" <rene.herman@gmail.com>, "Bodo Eggert" <7eggert@gmx.de>,
       "Matt Mackall" <mpm@selenic.com>,
       "Jeremy Fitzhardinge" <jeremy@goop.org>,
       "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
       "David Chinner" <dgc@sgi.com>, "Arjan van de Ven" <arjan@infradead.org>
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On 17/07/07, William Lee Irwin III <wli@holomorphy.com> wrote:
> At some point in the past, I wrote:
> >> If at some point one of the pro-4k stacks crowd can prove that all
> >> code paths are safe, or introduce another viable alternative (such as
> >> Matt's idea for extending the stack dynamically), then removing the 8k
> >> stacks option makes sense.
>
> On Mon, Jul 16, 2007 at 11:54:38PM +0100, Alan Cox wrote:
> > Any x86-32 path unsafe with 4K stacks is almost certainly unsafe with 8K
> > stacks because the 8K stacks do not have seperate IRQ stack paths, so you
> > have the same space but split. It might be less predictable on 8K stacks
> > but it isn't absent.
>
> At hch's suggestion I rewrote the separate IRQ stack configurability
> patch into one making IRQ stacks mandatory and unconfigurable, and
> hence enabled with 8K stacks.
>
For what it's worth, that sounds good to me - like something that we
would want merged.

-- 
Jesper Juhl <jesper.juhl@gmail.com>
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