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* [PATCH] drm/xe/guc: Keep scheduler timeline name alive
@ 2026-07-14  6:44 Arvind Yadav
  2026-07-14  8:20 ` ✓ CI.KUnit: success for " Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Arvind Yadav @ 2026-07-14  6:44 UTC (permalink / raw)
  To: intel-xe
  Cc: matthew.brost, himal.prasad.ghimiray, thomas.hellstrom,
	rodrigo.vivi, tejas.upadhyay

The scheduler keeps a pointer to the timeline name, but q->name
is freed with the exec queue while scheduler fences can still
reference it.

Store the name in struct xe_guc_exec_queue so it shares
the scheduler's RCU-deferred lifetime.

Fixes: 6bd90e700b42 ("drm/xe: Make dma-fences compliant with the safe access rules")
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Arvind Yadav <arvind.yadav@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_exec_queue_types.h | 5 +++++
 drivers/gpu/drm/xe/xe_guc_submit.c           | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h b/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
index e5e53b421f29..cda14d954e57 100644
--- a/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_exec_queue_types.h
@@ -10,6 +10,7 @@
 #include <linux/workqueue.h>
 
 #include "xe_gpu_scheduler_types.h"
+#include "xe_hw_fence_types.h"
 
 struct dma_fence;
 struct xe_exec_queue;
@@ -24,6 +25,10 @@ struct xe_guc_exec_queue {
 	struct rcu_head rcu;
 	/** @sched: GPU scheduler for this xe_exec_queue */
 	struct xe_gpu_scheduler sched;
+	/**
+	 * @name: Scheduler timeline name, kept with @sched until RCU free.
+	 */
+	char name[MAX_FENCE_NAME_LEN];
 	/** @entity: Scheduler entity for this xe_exec_queue */
 	struct xe_sched_entity entity;
 	/**
diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index cec3bbf3a10e..8ef6eeebfaa8 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -1978,6 +1978,8 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 
 	xe_exec_queue_assign_name(q, q->guc->id);
 
+	strscpy(ge->name, q->name, sizeof(ge->name));
+
 	/*
 	 * Use primary queue's submit_wq for all secondary queues of a
 	 * multi queue group. This serialization avoids any locking around
@@ -1992,7 +1994,7 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 	err = xe_sched_init(&ge->sched, &drm_sched_ops, &xe_sched_ops,
 			    submit_wq, xe_lrc_ring_size() / MAX_JOB_SIZE_BYTES, 64,
 			    timeout, guc_to_gt(guc)->ordered_wq, NULL,
-			    q->name, gt_to_xe(q->gt)->drm.dev);
+			    ge->name, gt_to_xe(q->gt)->drm.dev);
 	if (err)
 		goto err_release_id;
 
-- 
2.43.0


^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2026-07-15  8:09 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-14  6:44 [PATCH] drm/xe/guc: Keep scheduler timeline name alive Arvind Yadav
2026-07-14  8:20 ` ✓ CI.KUnit: success for " Patchwork
2026-07-14  9:32 ` [PATCH] " Tvrtko Ursulin
2026-07-15  4:26   ` Yadav, Arvind
2026-07-15  7:49     ` Tvrtko Ursulin
2026-07-15  7:54       ` Matthew Brost
2026-07-15  8:09         ` Tvrtko Ursulin
2026-07-14 12:55 ` ✓ Xe.CI.FULL: success for " Patchwork

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