Comment 11 for bug 541511

> --- Comment #9 from Bruno <email address hidden> 2010-03-20 16:20:41 PST ---
> Created an attachment (id=34270)
> --> (http://bugs.freedesktop.org/attachment.cgi?id=34270)
> BUG in i915_gem.c - obj_priv->pages_refcount is zero in
> i915_gem_object_put_pages()
>
> > Thanks for testing. Unfortunately the patch you tested is outdated and
> > known not to work. At least the failure rates you're getting on your
> > Pentium M 1.5 GHz are about the same as on my Pentium M 1.2 GHz. Can you
> > please retest with my latest patch (attached to this bug)?
>
> It seems to be very much a matter of mood, on friday evening I saw no single
> bad message while today there were a lot.

Just to clarify: You're talking about the BUG in i915_gem_object_put_pages
here, not the "chipset flush failed" warning? And this is still on the old
version of the patch, right?

> Since a crash I'm running now with 2.6.34-rc2 + your patch and one of mine for
> sd.
> Both with previous patch and current one I'm hitting a BUG() in
> i915_gem_object_put_pages(). obj_priv->pages_refcount is zero in there. No idea
> if it's related or not but it kills i915 driver!

Known issue, I get these here from time to time, too. Looks like my
unmap-inactive hack, intended to stress gtt cache flushing is uncovering
another problem somewhere else. I'll look into this more seriously now.