linux-kernel - [RFC] User space to kernel space copy optimization

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Message-ID: <564A5057.9080203@codeaurora.org>
Date:	Mon, 16 Nov 2015 16:53:27 -0500
From:	Sinan Kaya <okaya@...eaurora.org>
To:	dmaengine@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [RFC] User space to kernel space copy optimization

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.

-- 
Sinan Kaya
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a
Linux Foundation Collaborative Project
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