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Re: [RFC] User space to kernel space copy optimization

From Vinod Koul <vinod.koul@intel.com>
Newsgroups linux.kernel
Subject Re: [RFC] User space to kernel space copy optimization
Date 2015-12-05 09:10 +0100
Message-ID <qCg4O-6CJ-5@gated-at.bofh.it> (permalink)
References <qvzYC-4nO-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

-- 
~Vinod
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Re: [RFC] User space to kernel space copy optimization Vinod Koul <vinod.koul@intel.com> - 2015-12-05 09:10 +0100
  Re: [RFC] User space to kernel space copy optimization Sinan Kaya <okaya@codeaurora.org> - 2015-12-06 05:30 +0100

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