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    SubjectRe: [PATCH] ep93xx: Implement double buffering for M2M DMA channels

    On 22-03-2012 14:00, Rafal Prylowski wrote:

    >> I haven't looked through the patch yet, since I'm waiting on more
    >> information from Mika and Hartley's testing.

    >> However, the commit log doesn't tell me why we want this change. Is it a
    >> performance improvement? If so, do you have some numbers that we can
    >> paste into the commit log?

    > In principle, using double buffering should be faster than using only
    > one buffer and disabling/enabling channel each time. But my measurements
    > doesn't show any significant change.

    > The real reason for this change is that current code is not 100% reliable
    > in IDE-DMA (I'm planning to submit ep93xx ide driver to linux-ide soon).

    IDE or libata driver? Asking because IDE drivers are not accepted anymore.

    WBR, Sergei

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