rv790, d-r-t, git ddx, mesa,libdrm and xserver 1.9. wait vline and dri2 vsync off.

Test is nexuiz 2.5.2, timedemo demos/demo1, effects normal, fullscreen 1920x1080.

The nexuiz sdl client isn't affected as badly as the glx client and will run to completion the demo. It may sometimes show the libc error on exit. The glx client will bail out during the demo with either a segfault or the libc trace below.

Both since the commit -

commit dde1391cc95478f4dedccdf920ba0a6607472937
Author: John Doe <glisse@barney.(none)>
Date:   Thu Sep 30 17:30:25 2010 -0400

    r600g: don't double count dirty block
    
    This avoid to overcount the number of dwords we need and
    thus avoid maximazation of cs buffer use.

Will give an error in dmesg.

[drm:radeon_cs_parser_init] *ERROR* cs IB too big: 16390
[drm:radeon_cs_ioctl] *ERROR* Failed to initialize parser !

The libc trace -

*** glibc detected *** ./nexuiz-linux-686-glx: double free or corruption (!prev): 0x0ba5e510 ***
======= Backtrace: =========
/lib/libc.so.6[0xb73d4d9a]
/lib/libc.so.6(cfree+0x6e)[0xb73d697e]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb6179950]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb61580aa]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb62a9169]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb623184d]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb6174b70]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb6154737]
/home/andy/Src/Xorg-git/modular/lib/libGL.so.1[0xb64edc40]
/home/andy/Src/Xorg-git/modular/lib/libGL.so.1[0xb64c8457]
/home/andy/Src/Xorg-git/modular/lib/libGL.so.1[0xb64c8bb6]
/home/andy/Src/Xorg-git/modular/lib/libX11.so.6(XCloseDisplay+0xb6)[0xb76a19c6]
./nexuiz-linux-686-glx[0x804d82d]
./nexuiz-linux-686-glx[0x80dec52]
./nexuiz-linux-686-glx[0x8198b15]
[0xffffe400]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb616a7a0]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb62de8c8]
/home/andy/Src/Mesa-git/mesa/lib/gallium/r600_dri.so[0xb619f8ca]
./nexuiz-linux-686-glx[0x80ae84c]
./nexuiz-linux-686-glx[0x8082b51]
./nexuiz-linux-686-glx[0x8087e9c]
./nexuiz-linux-686-glx[0x80dfb5f]
./nexuiz-linux-686-glx[0x804b0fd]
/lib/libc.so.6(__libc_start_main+0xd0)[0xb7387380]
./nexuiz-linux-686-glx[0x804aff1]