Re: [PATCH v3 0/6] Attempt to fixup reset, wedge, unload corner cases

Matthew Brost
2026-01-20T20:36:07Z

On Tue, Jan 20, 2026 at 03:16:15PM -0500, Zhanjun Dong wrote:
> We have several bug reports [1], [2], [3] describing failures in reset,
> wedge, and unload corner cases where memory is not properly freed or
> fences fail to signal. This patch attempts to address the issue by
> forcefully killing any remaining queues on driver unload and wedging the
> device if not in mode 2.
>
> Zhanjun Dong
>
> [1] https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/5466
> [2] https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/5530
> [3] https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6029
>

Thanks for picking this back up. I assume this series fixes all the
issues which you can recreate?

Matt

> ---
> History started from v2 (v1 not found):
> v3:
> - Add patch 3-6 in series
> - For "Trigger queue cleanup if not in wedged mode 2":
> Add guc_ct_stop and reset prepare in patch of:
> Sync with baseline changes
>
> Matthew Brost (3):
> drm/xe: Always kill exec queues in xe_guc_submit_pause_abort
> drm/xe: Forcefully tear down exec queues in GuC submit fini
> drm/xe: Trigger queue cleanup if not in wedged mode 2
>
> Zhanjun Dong (3):
> drm/xe/guc: Ensure CT state transitions via STOP before DISABLED
> drm/xe/uc: Drop xe_guc_sanitize in favor of managed cleanup
> drm/xe/guc: Fix page fault by moving guc_submit_fini to devm
>
> drivers/gpu/drm/xe/xe_guc_ct.c | 1 +
> drivers/gpu/drm/xe/xe_guc_submit.c | 68 +++++++++++++++++++-----------
> drivers/gpu/drm/xe/xe_uc.c | 2 -
> 3 files changed, 45 insertions(+), 26 deletions(-)
>
> --
> 2.34.1
>