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    SubjectRe: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework
    On Fri, 20 Aug 2010 15:15:10 +0200, Peter Zijlstra <peterz@infradead.org> wrote:
    > So the idea is to grab a large chunk of memory at boot time and then
    > later allow some device to use it?
    >
    > I'd much rather we'd improve the regular page allocator to be smarter
    > about this. We recently added a lot of smarts to it like memory
    > compaction, which allows large gobs of contiguous memory to be freed for
    > things like huge pages.
    >
    > If you want guarantees you can free stuff, why not add constraints to
    > the page allocation type and only allow MIGRATE_MOVABLE pages inside a
    > certain region, those pages are easily freed/moved aside to satisfy
    > large contiguous allocations.

    I'm aware that grabbing a large chunk at boot time is a bit of waste of
    space and because of it I'm hoping to came up with a way of reusing the
    space when it's not used by CMA-aware devices. My current idea was to
    use it for easily discardable data (page cache?).

    > Also, please remove --chain-reply-to from your git config. You're using
    > 1.7 which should do the right thing (--no-chain-reply-to) by default.

    OK.

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