Comment # 26 on bug 82162 from mmstickman@gmail.com

After compiling the latest version of mesa from git, I'm still getting this bug
with my Radeon HD 7950 spamming the system log.

[  372.835016] [TTM] Illegal buffer object size
[  372.835019] [TTM] Illegal buffer object size
[  372.835021] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM
object (0, 6, 4096, -22)

So it doesn't seem to be fixed for me at least.