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    SubjectRE: [PATCH] Cachefiles, mpage_cleardirty addtition, west bridge related

    > From: []

    > David Cross <> wrote:

    > > This patch adds the mpage_cleardirty function to the cachefiles >
    implementation in the kernel.

    > Ummm... How is this used by cachefiles? Nothing in this patch actually >
    > mpage_cleardirty().

    This is used by the current west bridge driver in the linux-next tree,
    marked as BROKEN at the moment. It is used in order to clear dirty pages
    from the page cache for a specific file after it has been allocated. This
    allows west bridge to transfer data from USB to storage directly without
    requiring that the file data path go through the CPU. The easiest way to
    think of this is that it allows for direct file based DMA. Please let me
    know if you have any additional questions or concerns on this.

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      Last update: 2010-09-08 18:55    [W:0.022 / U:50.412 seconds]
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