[Bug 35194] New: [r600g] Evergreen - failed to map bo

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35194

           Summary: [r600g] Evergreen - failed to map bo
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: rubenf3000@gmail.com


Created an attachment (id=44337)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=44337)
output generated with MESA_GLSL=dump

The game "Back to the Future: the game" crashes at many points with
the message:

radeon_bo_fixed_map failed to map bo
EE radeon_bo.c:120 radeon_bo - failed to map bo

It usually happens at random moments, altough there are specific actions
that trigger the crash reliably.

It works correctly using llvmpipe.

The "failed to map" message originates in the function "radeon_bo_fixed_map"
in "mesa/src/gallium/winsys/r600/drm/radeon_bo.c", when doing a call to mmap;
upon debugging, I found it fails with ENOMEM, despite having more than enough
free RAM available at the time (it only allocates half a megabyte, and I had
almost 1GB of free RAM at the moment of crashing)

Upon further inspection, I found that, at the moment of the crash, the game had
almost exactly 1 gigabyte of buffer objects mmap'd; could it have something to
do with my card having 1GB of video RAM? seems unlikely, since mmap maps to
system memory.

Graphics Card: ATI Technologies Inc Juniper [Radeon HD 5750 Series]
CPU: Intel Core Duo 1.8 Ghz, 2.5 GB RAM
Linux kernel 2.6.37, libdrm 2.4.24
Latest Mesa git

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