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    SubjectRe: [PATCH 08/10] mm: cma: Contiguous Memory Allocator added
    On Tuesday 14 June 2011 18:58:35 Michal Nazarewicz wrote:
    > On Tue, 14 Jun 2011 18:03:00 +0200, Arnd Bergmann wrote:
    > > For all I know, that is something that is only true for a few very
    > > special Samsung devices,
    > Maybe. I'm just answering your question. :)
    > Ah yes, I forgot that separate regions for different purposes could
    > decrease fragmentation.

    That is indeed a good point, but having a good allocator algorithm
    could also solve this. I don't know too much about these allocation
    algorithms, but there are probably multiple working approaches to this.

    > > I would suggest going forward without having multiple regions:
    > 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.

    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.


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