[PATCH 30/45] drm/ttm: add a new invalidate notify callback.

[Dave Airlie]

On Thu, 24 Sep 2020 at 22:25, Christian König <christian.koenig at amd.com> wrote:
>
> Am 24.09.20 um 07:18 schrieb Dave Airlie:
> > From: Dave Airlie <airlied at redhat.com>
> >
> > Signed-off-by: Dave Airlie <airlied at redhat.com>
>
> NAK, completely unnecessary.
>
> We should rather do the remaining accounting in the already existing
> release_notify() callback.
>
> That makes much more sense and if I'm not completely mistaken could
> actually fix a bug in amdgpu.

release_notify is called from one path, but there is a path in
eviction where if it gets pass 0 placements
it tears down the memory, and allocates a tt.

I'm considering whether it should be acceptable to call evict with no
placements (though maybe that just means evict to system).

Dave.