[Intel-gfx] Memory leak using UXA acceleration and EXT_texture_from_pixmap

[Garry Bodsworth]

Hi there,

I am having a problem with a memory leak when I use UXA in the Intel  
drivers.  Each time a pixmap is assigned to a texture in OpenGL using  
XComposite (EXT_texture_from_pixmap) GEM objects are leaking.

I have tried various versions of the kernel and Intel driver, but I am  
using the latest 2.6.30 kernel and Intel 2.7.1 driver.  Also the Mesa  
version is 7.4 and libdrm is 2.4.9.  I have tried the latest git  
version of all items.

The hardware I am using is a EeeBox B202 with a 1.6GHz Atom and an  
Intel 945GM integrated graphics processor.

I've put together a small example of it going wrong (attached) in the  
hope that someone can either diagnose it or tell me where to look so I  
might be able to do so.  As I am writing a kind of compositor I hit  
the memory leak really hard, but it meant I could create a cut-down  
example.  It is attached to the email - building instructions are in  
the comments.

I have found related issues in various bug trackers, all phrased in  
slightly different ways, but people tend to notice the most when they  
are using a compositing window manager.  I've put a few of them at the  
end of this email if anyone is interested.

The following two links are to commits that says they attempt to fix  
the problem in xorg and mesa respectively:
http://cgit.freedesktop.org/xorg/xserver/commit/?id=7b6400a1b8d2f228fcbedf17c30a7e3924e4dd2a
http://cgit.freedesktop.org/mesa/mesa/commit/?id=fc6d89145df6fc7a1c2ce648b474c3f203ca87c7

Other than this issue (admittedly a show stopper) the performance is  
really good because I can composite XVideo sources at a really good  
framerate - also with no tearing thanks to whoever implemented  
glXSwapBuffers.

Thanks,
Garry Bodsworth


RELATED ISSUES:
Driver -
memory leak: Keep resizing glxgears window with compiz will make X hang
http://bugs.freedesktop.org/show_bug.cgi?id=20704

Kernel -
i915: drm: xorg leaks drm objects massively
http://bugzilla.kernel.org/show_bug.cgi?id=13294

Ubuntu -
High load average, disk read, no apparent reason - 2.6.28-11
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/367377
[GM45] (Needs -intel 2.7.0) memory leak causes system to run out of  
memory (UXA/EXA)
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/360319

Moblin -
memory leak while playing video stream
http://bugzilla.moblin.org/show_bug.cgi?id=2375

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