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    SubjectRe: [RFC] mmap(MAP_CONTIG)
    Date
    On Tue, Oct 03 2017, Mike Kravetz wrote:
    > At Plumbers this year, Guy Shattah and Christoph Lameter gave a presentation
    > titled 'User space contiguous memory allocation for DMA' [1]. The slides
    > point out the performance benefits of devices that can take advantage of
    > larger physically contiguous areas.

    Issue I have is that kind of memory needed may depend on a device. Some
    may require contiguous blocks. Some may support scatter-gather. Some
    may be behind IO-MMU and not care either way.

    Furthermore, I feel déjà vu. Wasn’t dmabuf supposed to address this
    issue?

    --
    Best regards
    ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ
    «If at first you don’t succeed, give up skydiving»

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