OS is current Debian Sid 32bit, card 1002:5960...

  So this is on r200 i spotted playing any video file vith gl render (but also
many videos in games are also affected), bisecting says it started with this
code in ttm:


http://cgit.freedesktop.org/~airlied/linux/commit/?h=drm-next&id=a095c60bd06f204c98527aafd5fda6ef42b53eb5

 And it performs the same also in 3.14-rc5 kernel :). It consume cca 40% or
more CPU power after that commit... that *more* depends on video file and if it
is in game or playing video file with mplayer -vo gl.

  Mesa version seems doesn't metter i tried 9.2 git, 10.0 git, 10.1 git and
current git master.