https://bugs.freedesktop.org/show_bug.cgi?id=79980
--- Comment #99 from Malte Schröder maltesch@gmx.de --- I am not sure if this is related, but what I see _a lot_ recently in my kernel log is this:
[ 554.747835] [TTM] Illegal buffer object size [ 554.747837] [TTM] Illegal buffer object size [ 554.747838] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (0, 6, 4096, -22)
This is on X.org 1.16.0, radeon_drv 7.4.99 with glamor enabled, mesa 10.2.5 and drm-next-3.17.