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    SubjectRe: [PATCH] CONFIG_PACKET_MMAP should depend on MMU
    On Fri, 20 Apr 2007 09:58:52 +0100
    David Howells <> wrote:
    > Because kmalloc() may be able to get us a smaller chunk of memory. Actually,
    > calling __get_free_pages() might be a better, and then release the excess
    > pages.

    Interesting, that rings a bell here.

    I wonder why we dont use this in alloc_large_system_hash().

    (if __get_free_pages(GFP_ATOMIC, order) is used instead of alloc_bootmem() or __vmalloc())

    We currently loose 1/4 of space on tcp hash table for example, because sizeof(inet_ehash_bucket) is not a power of 2.

    Is it really possible to allocate an order-10 page, then release part of it (say an order-8 subpage) ?

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