On Tue, 02 Oct 2018, "Zhang, Owen" <owen.zhang@xxxxxxxxx> wrote: > Could you help to give any suggestions on this? Thanks very much. Greg, Stable team, Please backport upstream commit 010e3e68cd9c ("drm/i915: Remove vma from object on destroy, not close") to v4.14. It fixes a previously backported commit: Fixes: 6209cb514d97 ("drm/i915: Flush pending GTT writes before unbinding") Thanks, Jani. -- Jani Nikula, Intel Open Source Graphics Center