[PATCH 08/10] mm: cma: Contiguous Memory Allocator added

[Michal Nazarewicz]

> On Tuesday 14 June 2011 18:58:35 Michal Nazarewicz wrote:
>> Is having support for multiple regions a bad thing?  Frankly,
>> removing this support will change code from reading context passed
>> as argument to code reading context from global variable.  Nothing
>> is gained; functionality is lost.

On Tue, 14 Jun 2011 20:30:07 +0200, Arnd Bergmann wrote:
> What is bad IMHO is making them the default, which forces the board
> code to care about memory management details. I would much prefer
> to have contiguous allocation parameters tuned automatically to just
> work on most boards before we add ways to do board-specific hacks.

I see those as orthogonal problems.  The code can have support for
multiple contexts but by default use a single global context exported
as cma_global variable (or some such).

And I'm not arguing against having “contiguous allocation parameters
tuned automatically to just work on most boards”.  I just don't see
the reason to delete functionality that is already there, does not
add much code and can be useful.

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