On Wed, 4 Dec 2019 at 12:36, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
>
> If we cannot handle a vma within the unbind loop, try to flush the
> pending events (i915_vma_parked, i915_vm_release) and try again. This
> avoids a round trip to userspace that is not guaranteed to make forward
> progress, as the events we wait upon require being idle.
>
> References: cb6c3d45f948 ("drm/i915/gem: Avoid parking the vma as we unbind")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
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