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    SubjectRe: Frontswap [PATCH 0/4] (was Transcendent Memory): overview
    On 04/29/2010 09:59 PM, Avi Kivity wrote:
    >
    > I'm convinced it's useful. The API is so close to a block device
    > (read/write with key/value vs read/write with sector/value) that we
    > should make the effort not to introduce a new API.
    >

    Plus of course the asynchronity and batching of the block layer. Even
    if you don't use a dma engine, you improve performance by exiting one
    per several dozen pages instead of for every page, perhaps enough to
    allow the hypervisor to justify copying the memory with non-temporal moves.

    --
    I have a truly marvellous patch that fixes the bug which this
    signature is too narrow to contain.



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