https://bugs.freedesktop.org/show_bug.cgi?id=30626

Summary: bisected nexuiz issue since r600g: don't double count dirty block Product: Mesa Version: git Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r600 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: lists@andyfurniss.entadsl.com

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]