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Date: Sat, 19 Apr 2008 09:59:48 -0500
From: Shawn Bohrer <shawn.bohrer@gmail.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Thomas Gleixner <tglx@linutronix.de>
Subject: Re: x86: 4kstacks default
Message-ID: <20080419145948.GA4528@lintop>
References: <200804181737.m3IHbabI010051@hera.kernel.org> <20080418142934.38ce6bf4.akpm@linux-foundation.org> <20080419142329.GA5339@elte.hu>
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On Sat, Apr 19, 2008 at 04:23:29PM +0200, Ingo Molnar wrote:
> 
> * Andrew Morton <akpm@linux-foundation.org> wrote:
> 
> > >  config 4KSTACKS
> > >  	bool "Use 4Kb for kernel stacks instead of 8Kb"
> > > -	depends on DEBUG_KERNEL
> > >  	depends on X86_32
> > > +	default y
> > 
> > This patch will cause kernels to crash.
> 
> what mainline kernels crash and how will they crash? Fedora and other 
> distros have had 4K stacks enabled for years:

If by other distros you mean RHEL then yes.  However, openSUSE,
Ubuntu, and Mandriva all still have 8K stacks.  I know of no other
distributions that default to 4K.

--
Shawn