Re: DMA to user space

From: Stephen C. Tweedie (sct@redhat.com)
Date: Thu Mar 23 2000 - 18:10:09 EST

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    Hi,

    On Wed, Mar 22, 2000 at 01:12:31PM +0000, David Woodhouse wrote:
    >
    > > The raw IO code in 2.3 allows you to do dma from user buffers to any
    > > block device.
    >
    > Why only block device?

    It's just terminology. Raw IO specifically means user-space dma to block
    devices: the /dev/raw* raw devices only work bound to block devices. Of
    course, there's nothing to stop you from doing similar IO to other
    devices.

    --Stephen

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