linux-kernel - [PATCH v3 1/2] drm/xe: replace use of system_unbound_wq with system_dfl

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Message-ID: <20260124145401.44992-2-marco.crivellari@suse.com>
Date: Sat, 24 Jan 2026 15:54:00 +0100
From: Marco Crivellari <marco.crivellari@...e.com>
To: linux-kernel@...r.kernel.org,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Cc: Tejun Heo <tj@...nel.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Marco Crivellari <marco.crivellari@...e.com>,
	Michal Hocko <mhocko@...e.com>,
	Thomas Hellstrom <thomas.hellstrom@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
Subject: [PATCH v3 1/2] drm/xe: replace use of system_unbound_wq with system_dfl_wq

This patch continues the effort to refactor workqueue APIs, which has begun
with the changes introducing new workqueues and a new alloc_workqueue flag:

   commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

The point of the refactoring is to eventually alter the default behavior of
workqueues to become unbound by default so that their workload placement is
optimized by the scheduler.

Before that to happen, workqueue users must be converted to the better named
new workqueues with no intended behaviour changes:

   system_wq -> system_percpu_wq
   system_unbound_wq -> system_dfl_wq

This way the old obsolete workqueues (system_wq, system_unbound_wq) can be
removed in the future.

Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@...e.com>
---
 drivers/gpu/drm/xe/xe_devcoredump.c | 2 +-
 drivers/gpu/drm/xe/xe_execlist.c    | 2 +-
 drivers/gpu/drm/xe/xe_guc_ct.c      | 4 ++--
 drivers/gpu/drm/xe/xe_oa.c          | 2 +-
 drivers/gpu/drm/xe/xe_vm.c          | 4 ++--
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c
index d444eda65ca6..6b47aaf8cc9f 100644
--- a/drivers/gpu/drm/xe/xe_devcoredump.c
+++ b/drivers/gpu/drm/xe/xe_devcoredump.c
@@ -362,7 +362,7 @@ static void devcoredump_snapshot(struct xe_devcoredump *coredump,
 
 	xe_engine_snapshot_capture_for_queue(q);
 
-	queue_work(system_unbound_wq, &ss->work);
+	queue_work(system_dfl_wq, &ss->work);
 
 	xe_force_wake_put(gt_to_fw(q->gt), fw_ref);
 	dma_fence_end_signalling(cookie);
diff --git a/drivers/gpu/drm/xe/xe_execlist.c b/drivers/gpu/drm/xe/xe_execlist.c
index 769d05517f93..730b600a5803 100644
--- a/drivers/gpu/drm/xe/xe_execlist.c
+++ b/drivers/gpu/drm/xe/xe_execlist.c
@@ -422,7 +422,7 @@ static void execlist_exec_queue_kill(struct xe_exec_queue *q)
 static void execlist_exec_queue_destroy(struct xe_exec_queue *q)
 {
 	INIT_WORK(&q->execlist->destroy_async, execlist_exec_queue_destroy_async);
-	queue_work(system_unbound_wq, &q->execlist->destroy_async);
+	queue_work(system_dfl_wq, &q->execlist->destroy_async);
 }
 
 static int execlist_exec_queue_set_priority(struct xe_exec_queue *q,
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index a5019d1e741b..351c9986f6cf 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -558,7 +558,7 @@ static int __xe_guc_ct_start(struct xe_guc_ct *ct, bool needs_register)
 	spin_lock_irq(&ct->dead.lock);
 	if (ct->dead.reason) {
 		ct->dead.reason |= (1 << CT_DEAD_STATE_REARM);
-		queue_work(system_unbound_wq, &ct->dead.worker);
+		queue_work(system_dfl_wq, &ct->dead.worker);
 	}
 	spin_unlock_irq(&ct->dead.lock);
 #endif
@@ -2093,7 +2093,7 @@ static void ct_dead_capture(struct xe_guc_ct *ct, struct guc_ctb *ctb, u32 reaso
 
 	spin_unlock_irqrestore(&ct->dead.lock, flags);
 
-	queue_work(system_unbound_wq, &(ct)->dead.worker);
+	queue_work(system_dfl_wq, &(ct)->dead.worker);
 }
 
 static void ct_dead_print(struct xe_dead_ct *dead)
diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
index f8bb28ab8124..c8e65e38081c 100644
--- a/drivers/gpu/drm/xe/xe_oa.c
+++ b/drivers/gpu/drm/xe/xe_oa.c
@@ -969,7 +969,7 @@ static void xe_oa_config_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
 	struct xe_oa_fence *ofence = container_of(cb, typeof(*ofence), cb);
 
 	INIT_DELAYED_WORK(&ofence->work, xe_oa_fence_work_fn);
-	queue_delayed_work(system_unbound_wq, &ofence->work,
+	queue_delayed_work(system_dfl_wq, &ofence->work,
 			   usecs_to_jiffies(NOA_PROGRAM_ADDITIONAL_DELAY_US));
 	dma_fence_put(fence);
 }
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 095bb197e8b0..ddf0a9567614 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -1091,7 +1091,7 @@ static void vma_destroy_cb(struct dma_fence *fence,
 	struct xe_vma *vma = container_of(cb, struct xe_vma, destroy_cb);
 
 	INIT_WORK(&vma->destroy_work, vma_destroy_work_func);
-	queue_work(system_unbound_wq, &vma->destroy_work);
+	queue_work(system_dfl_wq, &vma->destroy_work);
 }
 
 static void xe_vma_destroy(struct xe_vma *vma, struct dma_fence *fence)
@@ -1854,7 +1854,7 @@ static void xe_vm_free(struct drm_gpuvm *gpuvm)
 	struct xe_vm *vm = container_of(gpuvm, struct xe_vm, gpuvm);
 
 	/* To destroy the VM we need to be able to sleep */
-	queue_work(system_unbound_wq, &vm->destroy_work);
+	queue_work(system_dfl_wq, &vm->destroy_work);
 }
 
 struct xe_vm *xe_vm_lookup(struct xe_file *xef, u32 id)
-- 
2.52.0