[Bug 29972] d-r-t /r6xx+: use new style fencing (v2) causes very poor gl perf.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29972

--- Comment #3 from Andy Furniss <lists at andyfurniss.entadsl.com> 2010-09-03 09:07:05 PDT ---
(In reply to comment #2)
> i think the problem come from the writeback patch:
> 
> other archlinux users have the same problem
> 
> https://bbs.archlinux.org/viewtopic.php?pid=820584#p820584
> 
> 
> with radeon.no_wb=1  in boot parameter, i don't have any slowdown.

no_wb=1 fixes for me also.
I have no problems with wb enabled + old fencing.

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