Re: [Linaro-mm-sig] [PATCH 08/10] mm: cma: Contiguous MemoryAllocator added

From: Michal Nazarewicz
Date: Wed Jun 22 2011 - 12:04:52 EST

On Wed, 22 Jun 2011 15:39:23 +0200, Arnd Bergmann <arnd@xxxxxxxx> wrote:
Why that? I would expect you can do the same that hugepages (used to) do
and just attempt high-order allocations. If they succeed, you can add them as a CMA region and free them again, into the movable set of pages, otherwise you just fail the request from user space when the memory is
already fragmented.

Problem with that is that CMA needs to have whole pageblocks allocated
and buddy can allocate at most half a pageblock.

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