[RFC] User space to kernel space copy optimization

Vinod Koul vinod.koul at intel.com
Sat Dec 5 00:10:31 PST 2015

On Mon, Nov 16, 2015 at 04:53:27PM -0500, Sinan Kaya wrote:
> One of the things I'm interested in is to use a memcpy capable DMA
> engine HW to optimize user space and kernel space parameter copying.
> Of course, this will not be viable for all parameter sizes but I can see
> this being useful. The goal is to save power in the cost of little
> performance.
> Before I go and invent my own mechanism, I'd like to have ideas on what
> an acceptable solution would look like. Especially, I'm looking for a
> generic implementation that could plug into any DMA engine HW.

Do you have a proposal on how this generic solution should look like, broad
contours of the design to start off with and we can start from that point


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