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Date: Thu, 24 Apr 2008 10:46:30 -0500
From: Eric Sandeen <sandeen@sandeen.net>
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To: Helge Hafting <helge.hafting@aitel.hist.no>
CC: Adrian Bunk <bunk@kernel.org>, Willy Tarreau <w@1wt.eu>,
       Andi Kleen <andi@firstfloor.org>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Shawn Bohrer <shawn.bohrer@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       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
References: <20080418142934.38ce6bf4.akpm@linux-foundation.org> <20080419142329.GA5339@elte.hu> <20080419145948.GA4528@lintop> <20080420080901.GF1595@cs181133002.pp.htv.fi> <20080420090623.7b173ef1@the-village.bc.nu> <20080420085104.GG1595@cs181133002.pp.htv.fi> <20080420103611.2c0d3519@the-village.bc.nu> <20080420104444.GI1595@cs181133002.pp.htv.fi> <87y778aezh.fsf@basil.nowhere.org> <20080420124717.GH8474@1wt.eu> <20080420132113.GA1899@cs181133002.pp.htv.fi> <480EFDD3.4020707@aitel.hist.no>
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Helge Hafting wrote:
> Adrian Bunk wrote:
>> What actually brings bad reputation is shipping a 4k option that is 
>> known to break under some circumstances.
>>   
> How about making 4k stacks incompatible with those circumstances then?
> I.e. is you select 4k stacks, then you can't select XFS because we know
> that _may_ fail. Similiar for ndiswrapper networking, and other
> stuff where problems have been noticed.

Problem is, it's the storage configuration (at administration time, not
kernel build time) that matters, too.

I have XFS on Fedora with 4k stacks on SATA /dev/sdb1 on my x86 mythbox,
and it's perfectly fine.  But that's a nice, simple setup.  If I stacked
more things over/under it, I'd be more likely to have trouble.

-Eric