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    SubjectRe: MAX_DMA_ADDRESS, virt_to_bus (and 3c505.c bug)
    On Fri, 6 Nov 1998, Alan Cox wrote:

    > (skb->data+skb->len)
    > and you ought to check it doesnt span a page. The 85230 driver has the
    > right bits in for that now. I've never seen a frame spanning a 64K boundary
    > on x86, and the mm may actually mean it cant occur.

    As all allocations start from a get_free_page, which only returns chunks
    on their natural boundries (ie 4K on 4K boundry... 64K on 64K boundry).
    Given that, unless the slab will allocate order > 4 chunks to satisfy
    packet allocations... and it will. Oh well. At least you can be
    reasonably sure that the packet won't cross the 16MB barrier.


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