From: Arnd Bergmann <arnd@arndb.de>
To: Robert Morell <rmorell@nvidia.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>,
Sumit Semwal <sumit.semwal@ti.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"jesse.barker@linaro.org" <jesse.barker@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linaro-mm-sig@lists.linaro.org" <linaro-mm-sig@lists.linaro.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"daniel@ffwll.ch" <daniel@ffwll.ch>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>
Subject: Re: [Linaro-mm-sig] [RFC v2 1/2] dma-buf: Introduce dma buffer sharing mechanism
Date: Tue, 13 Dec 2011 15:10:02 +0000 [thread overview]
Message-ID: <201112131510.02785.arnd@arndb.de> (raw)
In-Reply-To: <20111212224408.GD4355@morell.nvidia.com>
On Monday 12 December 2011, Robert Morell wrote:
> >
> > Doing a buffer sharing with something that is not GPL is not fun, as, if any
> > issue rises there, it would be impossible to discover if the problem is either
> > at the closed-source driver or at the open source one. At the time I was using
> > the Nvidia proprietary driver, it was very common to have unexplained issues
> > caused likely by bad code there at the buffer management code, causing X
> > applications and extensions (like xv) to break.
> >
> > We should really make this EXPORT_SYMBOL_GPL(), in order to be able to latter
> > debug future share buffer issues, when needed.
>
> Sorry, I don't buy this argument. Making these exports GPL-only is not
> likely to cause anybody to open-source their driver, but will rather
> just cause them to use yet more closed-source code that is even less
> debuggable than this would be, to those without access to the source.
But at least the broken module then won't be interacting with other modules
because it cannot share any buffers.
Arnd
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next prev parent reply other threads:[~2011-12-13 15:10 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-02 8:57 [RFC v2 0/2] Introduce DMA " Sumit Semwal
2011-12-02 8:57 ` [RFC v2 1/2] dma-buf: Introduce dma " Sumit Semwal
2011-12-02 17:11 ` Konrad Rzeszutek Wilk
2011-12-05 9:48 ` Semwal, Sumit
2011-12-05 17:18 ` Arnd Bergmann
2011-12-05 18:55 ` Daniel Vetter
2011-12-05 19:29 ` Arnd Bergmann
2011-12-05 20:58 ` Daniel Vetter
2011-12-05 22:04 ` Arnd Bergmann
2011-12-05 22:33 ` Daniel Vetter
2011-12-05 20:46 ` Rob Clark
2011-12-05 21:23 ` Daniel Vetter
2011-12-05 22:11 ` Rob Clark
2011-12-05 22:33 ` Daniel Vetter
2011-12-06 13:16 ` Arnd Bergmann
2011-12-06 15:28 ` Daniel Vetter
2011-12-07 13:27 ` Semwal, Sumit
2011-12-07 13:40 ` Arnd Bergmann
2011-12-08 21:44 ` [Linaro-mm-sig] " Daniel Vetter
2011-12-09 14:13 ` Arnd Bergmann
2011-12-09 14:24 ` Alan Cox
2011-12-10 4:01 ` Daniel Vetter
2011-12-12 16:48 ` Arnd Bergmann
2011-12-19 6:16 ` Semwal, Sumit
2011-12-20 15:41 ` Arnd Bergmann
2011-12-20 16:41 ` Rob Clark
2011-12-20 17:14 ` Daniel Vetter
2011-12-21 17:27 ` Arnd Bergmann
2011-12-21 19:04 ` Daniel Vetter
2011-12-23 10:00 ` Semwal, Sumit
2011-12-23 17:10 ` Rob Clark
2011-12-20 9:03 ` Sakari Ailus
2011-12-20 15:36 ` Arnd Bergmann
2012-01-01 20:53 ` Sakari Ailus
2012-01-01 23:12 ` Rob Clark
2011-12-13 13:33 ` Hans Verkuil
2011-12-05 22:09 ` Arnd Bergmann
2011-12-05 22:15 ` Rob Clark
2011-12-05 22:35 ` Rob Clark
2011-12-07 6:35 ` Semwal, Sumit
2011-12-07 10:11 ` Arnd Bergmann
2011-12-07 11:02 ` Semwal, Sumit
2011-12-07 11:34 ` Arnd Bergmann
2011-12-09 22:50 ` [Linaro-mm-sig] " Robert Morell
2011-12-10 11:13 ` Mauro Carvalho Chehab
2011-12-12 22:44 ` Robert Morell
2011-12-13 15:10 ` Arnd Bergmann [this message]
2011-12-20 2:05 ` Robert Morell
2011-12-20 14:29 ` Anca Emanuel
2012-01-09 6:20 ` InKi Dae
2012-01-09 8:10 ` Daniel Vetter
2012-01-09 8:11 ` [Linaro-mm-sig] " Dave Airlie
2012-01-09 10:10 ` InKi Dae
2012-01-09 10:27 ` Daniel Vetter
2012-01-09 12:06 ` InKi Dae
2012-01-09 16:02 ` Daniel Vetter
2012-01-09 15:17 ` Rob Clark
2012-01-10 1:34 ` InKi Dae
2012-01-10 2:14 ` Rob Clark
2012-01-10 6:09 ` Semwal, Sumit
2012-01-10 7:28 ` InKi Dae
2012-01-10 9:19 ` InKi Dae
2012-01-11 1:08 ` InKi Dae
2011-12-02 8:57 ` [RFC v2 2/2] dma-buf: Documentation for buffer sharing framework Sumit Semwal
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