linux-kernel - Re: [RFC] dma-buf: Implement test module

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Message-ID: <20131214123912.GF17467@mithrandir>
Date:	Sat, 14 Dec 2013 13:39:13 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Thomas Hellstrom <thellstrom@...are.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: Re: [RFC] dma-buf: Implement test module

On Thu, Dec 12, 2013 at 08:34:28PM +0100, Thomas Hellstrom wrote:
> On 12/12/2013 03:36 PM, Thierry Reding wrote:
> >This is a simple test module that can be used to allocate, export and
> >delete DMA-BUF objects. It can be used to test DMA-BUF sharing in
> >systems that lack a real second driver.
> >
> >
> 
> Looks nice. I wonder whether this could be extended to create a "streaming"
> dma-buf from a user space mapping. That could be used as a generic way to
> implement streaming (user) buffer objects, rather than to add explicit
> support for those in, for example, TTM.

I'm somewhat reluctant to beef this up needlessly to prevent it from
being used for purposes other than testing.

Thierry

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