[Intel-gfx] [PATCH] intel: Mark cached bo as purgeable

[Chris Wilson]

On Fri, 2009-06-19 at 09:50 +0800, Shaohua Li wrote:
> we need to unmap the object like my reference patch. Truncate page will
> unmap the object. And if libdrm thinks the object->virtual is still valid,
> then things will get wrong.

I was thinking a bit more about this... We don't need to unmap the bo
upon entering the cache as we check when we retrieve the bo from the
cache as to whether it was truncated in the meantime. If it was
truncated, we free the dead bo and create a new one. (Since that is more
convenient, though we could just reset the bo.)
-ickle