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    SubjectRe: [RFC][PATCH 1/3] contigous big page allocator
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    On Thu, Oct 14, 2010 at 10:07 AM, FUJITA Tomonori
    <fujita.tomonori@lab.ntt.co.jp> wrote:
    > On Wed, 13 Oct 2010 09:01:43 +0200
    > Andi Kleen <andi@firstfloor.org> wrote:
    >
    >> KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> writes:
    >> >
    >> > What this wants to do:
    >> >   allocates a contiguous chunk of pages larger than MAX_ORDER.
    >> >   for device drivers (camera? etc..)
    >>
    >> I think to really move forward you need a concrete use case
    >> actually implemented in tree.
    >
    > As already pointed out, some embeded drivers need physcailly
    > contignous memory. Currenlty, they use hacky tricks (e.g. playing with
    > the boot memory allocators). There are several proposals for this like
    > adding a new kernel memory allocator (from samsung).
    >
    > It's ideal if the memory allocator can handle this, I think.

    Not only contiguous, but sometimes also coherent.

    --
    Felipe Contreras
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