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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #3 from Rubén Fernández <rubenf3000 at gmail.com> 2011-04-04 22:48:23 PDT ---
The problem seems to be related to the way wine manages memory; wine reserves
the top 2GB of the addressing space to itself on startup, leaving only 2GB for
everything else (including mesa and the userspace radeon driver); it seems we
aren't running out of memory, but out of addressing space.

For instance, patching wine to make it use only the top 1GB of address space
mitigates the problem (but doesn't make it go away) - the "failed to map bo"
crashes occur with much lower frequency.

This might even be a wine bug - altough it doesn't occur with LLVMPIPE
rendering, or with r300, or with a proprietary driver.

I'll attach the wine patch, just for reference.

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