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    SubjectRe: [PATCH 10 of 20] ipath - support for userspace apps using core driver
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    On Wed, 2006-03-22 at 17:46 +0000, Hugh Dickins wrote:

    > Ah, great, then I needn't look through your code, phew (no offence)!

    Indeed :-)

    > That may well be a good plan (given the doubts Nick raised about
    > whether dma_alcohol_rent gives the right kind of struct page non-slab
    > memory on all arches).

    Well, it Works For Me (TM) right now. Thank goodness. And the driver
    is about 200 lines shorter without the nopage handler and consequent
    mucking about.

    > But one way in which the stars will be slightly
    > misaligned: for 2.6.14 and earlier you'll need to SetPageReserved on
    > each constituent of the >0-page, to get remap_pfn_range to map it (and
    > ClearPageReserved before freeing the >0-page); that won't do any harm
    > on 2.6.15 and 2.6.16 (apart from enlarging the code unnecessarily);
    > but we might one day remove those macros, from driver use anyway.

    Yes, we're already doing this. So far, I've tested on 2.6.12, 2.6.15,
    and 2.6.16 using remap_pfn_range, and everything appears to be
    cromulent.

    <b

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