[Intel-gfx] [PATCH 1/2] drm/i915: Discard a misplaced GGTT vma

[Matthew Auld]

On Fri, 5 Jun 2020 at 11:56, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>
> Across the many users of the GGTT vma (internal objects, mmapings,
> display etc), we may end up with conflicting requirements for the
> placement. Currently, we try to resolve the conflict by unbinding the
> vma and rebinding it to match the new constraints; over time we will end
> up with a GGTT that matches the most strict constraints over all
> concurrent users. However, this causes a problem if the vma is currently
> in use as we must wait until it is idle before moving it. But there is
> no restriction on the number of views we may use (apart from the limited
> size of the GGTT itself), and so if the active vma does not meet our
> requirements, try and build a new one!
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Heebie-jeebies aside,
Reviewed-by: Matthew Auld <matthew.auld at intel.com>