From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bernd Petrovitsch <bernd@firmix.at>
Subject: Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c -
	bisected
Date: Wed, 27 Aug 2008 21:30:31 +0200
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To: Jamie Lokier <jamie@shareable.org>
Cc: Parag Warudkar <parag.lkml@gmail.com>, Linus Torvalds <torvalds@linux-foundation.org>, Adrian Bunk <bunk@stusta.de>, Rusty Russell <rusty@rustcorp.com.au>, "Alan D. Brunelle" <Alan.Brunelle@hp.com>, "Rafael J. Wysocki" <rjw@sisk.pl>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Kernel Testers List <kernel-testers@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Arjan van de Ven <arjan@linux.intel.com>, Ingo Molnar <mingo@elte.hu>, linux-embedded@vger.kernel.org

On Mit, 2008-08-27 at 18:51 +0100, Jamie Lokier wrote:
> Bernd Petrovitsch wrote:
[...]
> It is, but the idea that small embedded systems go through a 'all
> components are known, drivers are known, test and if it passes it's
> shippable' does not always apply.

Not always but often enough. And yes, there is ARM-based embedded
hardware with 1GB Flash-RAM and 128MB RAM.

> > > I'm seriously thinking of forwarding porting the 4 year old firmware
> > > from 2.4.26 to 2.6.current, just to get new drivers and capabilities.
> > 
> > That sounds reasonable (and I never meant maintaining the old system
> > infinitely.
> 
> Sounds reasonable, but it's vetoed for anticipated time and cost,

That is to be expected;-)

[....]
> > ACK. We avoid MMU-less hardware too - especially since there is enough
> > hardware with a MMU around.
> 
> I can't emphasise enough how much difference MMU makes to Linux userspace.
> 
> It's practically: MMU = standard Linux (with less RAM), have everything.
> No-MMU = lots of familiar 'Linux' things not available or break.

ACK. And tell that a customer that everything is more effort and more
risk and not just "simply cross-compile it as it runs on my desktop
too".

	Bernd
-- 
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