Fedora ATi driver performs much worse than the vanilla code

[Joshua C.]

I was testing the latest xf86-video-radeon with f11 and the latest
xorg-x11-server. And to my surprise the fedora version performs much
worse than the vanilla code here:
http://lists.freedesktop.org/archives/xorg-announce/2009-February/000771.html.
Installed are:
mesa-libGLU-7.3-5.fc11.x86_64
mesa-libGL-7.3-5.fc11.x86_64
mesa-dri-drivers-7.3-5.fc11.x86_64
libdrm-2.4.5-0.fc11.x86_64
xorg-x11-server-utils-7.4-5.fc11.x86_64
xorg-x11-server-common-1.6.0-2.fc11.x86_64
xorg-x11-server-Xorg-1.6.0-2.fc11.x86_64
xorg-x11-drv-ati-6.11.0-1.1.fc11.x86_64 (from vanilla source without
extra patches)
kernel-2.6.29-0.172.rc6.git4.fc11.x86_64
With the fedora version (with all the patches) I cannot do basic
things like watch flash files and video (almost no hardware
acceleration). This results in 100% cpu usage, screen distortions. At
the same time the vanilla code playes the video files smoothly and
everything is fine. Even the kms works! With the fedora code I need to
pass radeon.gartsize=128 at startup in order to make it start the
xserver. And in terms of speed it's far behind the vanilla code.

I saw that some patches date back to before  6.10.0. Are they still
needed? Has someone else tried this?