Messages in this thread | | | Subject | Re: [Linaro-mm-sig] [PATCH 08/10] mm: cma: Contiguous Memory Allocator added | Date | Wed, 22 Jun 2011 18:04:39 +0200 | From | "Michal Nazarewicz" <> |
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On Wed, 22 Jun 2011 15:39:23 +0200, Arnd Bergmann <arnd@arndb.de> 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.
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