linux-kernel - Re: [PATCH 2/4] mm: cma: Contiguous Memory Allocator added

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Date:	Wed, 21 Jul 2010 20:38:12 +0200
From:	Michał Nazarewicz <m.nazarewicz@...sung.com>
To:	Daniel Walker <dwalker@...eaurora.org>
Cc:	linux-mm@...ck.org, Marek Szyprowski <m.szyprowski@...sung.com>,
	Pawel Osciak <p.osciak@...sung.com>,
	Xiaolin Zhang <xiaolin.zhang@...el.com>,
	Hiremath Vaibhav <hvaibhav@...com>,
	Robert Fekete <robert.fekete@...ricsson.com>,
	Marcus Lorentzon <marcus.xm.lorentzon@...ricsson.com>,
	linux-kernel@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/4] mm: cma: Contiguous Memory Allocator added

> On Wed, 2010-07-21 at 20:11 +0200, Michał Nazarewicz wrote:
>> Not really.  This will probably be used mostly on embedded systems
>> where users don't have much to say as far as hardware included on the
>> platform is concerned, etc.  Once a phone, tablet, etc. is released
>> users will have little need for customising those strings.

On Wed, 21 Jul 2010 20:19:08 +0200, Daniel Walker <dwalker@...eaurora.org> wrote:
> You can't assume that user won't want to reflash their own kernel on the
> device. Your assuming way too much.

If user is clever enough to reflash a phone she will find the strings
easy especially that they are provided from: (i) bootloader which is
even less likely to be reflashed and if someone do reflash bootloader
she is a guru who'd know how to make the strings; or (ii) platform
defaults which will be available with the rest of the source code
for the platform.

> If you assume they do want their own kernel then they would need this
> string from someplace. If your right and this wouldn't need to change,
> why bother allowing it to be configured at all ?

Imagine a developer who needs to recompile the kernel and reflash the
device each time she wants to change the configuration...  Command line
arguments seems a better option for development.

And the configuration is needed because it is platform-dependent
so it needs to be set for each platform.

-- 
Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=./ `o
| Computer Science,  Michał "mina86" Nazarewicz       (o o)
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