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    SubjectRe: [discuss] Re: 32-bit dma allocations on 64-bit platforms
    if you want to leave it disabled that's still fine with me as far as it
    can be enabled in a optimal way (the one I like as usual is the 256/32
    ratios of 2.4 ;), but I'm quite convinced that it will provide benefit
    even if enabled, possibly with bigger ratios if you want less
    "guaranteed" waste.

    as usual if one doesn't want any ram and performance waste, x86-64 is
    out there in production, and it'll avoid all the waste (unless you care
    about wasting 16M of ram on a 4G box without the risk of failing
    order 0 dma allocations on the intel implementation). If one want to go
    cheap and buy x86 still then he must be prepared to potentially lose
    900M of ram on a 32G box, it's a relative cost, so the more ram the more
    memory will be potentially wasted, the less ram the less ram will be
    potentially wasted.

    the most frequent x86 highmem complains I ever got were related to
    runing _out_ of lowmem zone with the lowmem zone _empty_. The day I will
    get a complain for the lowmem being completely _free_ has yet to come ;).

    thanks a lot for all the help.
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