[Bug 45018] [bisected] rendering regression since added support for virtual address space on cayman v11

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=45018

--- Comment #66 from Alexandre Demers <alexandre.f.demers at gmail.com> 2012-07-23 18:49:17 PDT ---
(In reply to comment #37)
> (In reply to comment #36)
> > I know I can run a 3.2 kernel, I know I can compile a different version or
> > bisect or submit patches, I know I can switch from Gnome Shell to another
> > window manager without fancy effects or that I can disable options if I follow
> > your advise. But this is not accessible to the average user.
> 
> You can run an older mesa release as well.  It's probably a better as a mesa
> knob than a kernel knob.
> 
> > 
> > Please, consider another option for the average users that will use compiled
> > code available soon.
> 
> We can add a mesa option if we aren't able to get this fixed in time for the
> next mesa release, but for now I'd prefer to leave it enabled otherwise most
> users will just disable it and not test the current code which won't help in
> getting it fixed.

So it's been a while now and no improvement (even with proposed patches or by
running drm-next kernel). Could we add this flag now so it will be possible to
disable VM for cayman if wanted? This way, people will still be able to use VM
by default, but for those encountering this problem, it will be possible to use
their card without seeing it locking up by this code. It will also be possible
to enable VM for them to test for any improvement or regression. Nobody's
loosing anything. I'll be able to test other commits and new features running
programs and piglit tests and once in a while I'll test the VM code (or test
any patches or fixes dev could suggest me).

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