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SubjectRe: [PATCH 08/10] mm: cma: Contiguous Memory Allocator added
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>> On Tue, 14 Jun 2011 15:49:29 +0200, Arnd Bergmann <arnd@arndb.de> wrote:
>>> Please explain the exact requirements that lead you to defining
>>> multiple contexts.

> On Tuesday 14 June 2011, Michal Nazarewicz wrote:
>> Some devices may have access only to some banks of memory. Some devices
>> may use different banks of memory for different purposes.

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.

> 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.

> * Remove the registration of specific addresses from the initial patch
> set (but keep the patch).
> * Add a heuristic plus command-line override to automatically come up
> with a reasonable location+size for *one* CMA area in the system.

I'm not arguing those.

--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michal "mina86" Nazarewicz (o o)
ooo +-----<email/xmpp: mnazarewicz@google.com>-----ooO--(_)--Ooo--


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