[Intel-gfx] [PATCH] drm/i915: Don't detach physical objects of cursor bo at cursor off

[Jesse Barnes]

On Tue, 22 Sep 2009 11:10:47 +0800
Li Peng <peng.li at linux.intel.com> wrote:

> The cache line flush in i915_gem_detach_phys_object() is big overhead
> if userspace app keep updating cursor bo and turn it on and off.
> We can keep using the physical objects attached at first time and
> don't detach them at cursor turning off. It will reduce the overhead.
> 
> Signed-off-by: Li Peng <peng.li at intel.com>

I recently pushed a change to the 2D driver to avoid the on/off calls;
it might help avoid the overhead you're fixing here.

commit b8c5c996e888485c3a16d645c8490592534a7882
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Tue Sep 15 19:45:47 2009 -0700

    Eliminate cursor flicker

Jesse