From nobody Tue Oct 7 15:01:31 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A37C52E11B6; Wed, 9 Jul 2025 11:53:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752062033; cv=none; b=DoEdhNlsc6vS6WeZ+JaIz/J7T9GnFrDD1eSUdSx5ovgbz0Vl024g+fQEzyA9keyar2DAH/9HnMAlojCvJ1kKYTrK3VG6Dvs/8GS4GAR4lUQhm8Tp/Z3a2FSNvOMLUZV+Vx9pRzwOyiO7yReWxTiBVw/BuYbNBCJqnHmfplDTVfQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752062033; c=relaxed/simple; bh=jwQeQF43fuuFdeU+odOP0p6i6/kacIOeRK9joESZCeg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ChIVQa0PlMm8FX2MEW7eZZk3G+V0seUsmmyT+tk8x3LDyKVR6YOTA0OQY7aXjIgX0GtTenovfQGvgIOR7CDuEjzflpzO+tmOMdUz/VCGWCkBYnTzSukYSShG1c4KcX0lYs5AL+tVB2mLgQPJ601GIZkI8CFDJYhQI/43lAAus0o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EvGQiVMN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EvGQiVMN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 72262C4CEF4; Wed, 9 Jul 2025 11:53:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752062033; bh=jwQeQF43fuuFdeU+odOP0p6i6/kacIOeRK9joESZCeg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EvGQiVMN8p5LGtSsPCloupb/qx9E6+SH7L0wcNxwuawdlWf3Hm46+of8DVTDB66UB kbjNzc9+wocjSiKGGT0ayFoZZEAZaiTZjXbXHGsG/G9neFX/2UsU/bh34wnBb14xX/ CvZ15mUx4sOy2UbzEfvTT6BeNH5UYSZpOpm42eQaE1mSKm0uUKeCt51fkQ3y33EKoG ES37guYQBzUOXe6JFpBrnl8i02P5/92fNcXewMTmg5Ikjs8o6VxCXweMlYxyZ1Qf4Q jD/gv6HzLABKr8POaH0Ig8/izqDUMrjufRpqndGH7f5ICiyO7y6Izt9Tx43/rh4a2M KjZEofwBWQSig== From: Philipp Stanner To: Lyude Paul , Danilo Krummrich , David Airlie , Simona Vetter , Matthew Brost , Philipp Stanner , =?UTF-8?q?Christian=20K=C3=B6nig?= , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sumit Semwal , Tvrtko Ursulin , Pierre-Eric Pelloux-Prayer Cc: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH v3 7/7] drm/nouveau: Remove waitque for sched teardown Date: Wed, 9 Jul 2025 13:52:57 +0200 Message-ID: <20250709115257.106370-9-phasta@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250709115257.106370-2-phasta@kernel.org> References: <20250709115257.106370-2-phasta@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" struct nouveau_sched contains a waitque needed to prevent drm_sched_fini() from being called while there are still jobs pending. Doing so so far would have caused memory leaks. With the new memleak-free mode of operation switched on in drm_sched_fini() by providing the callback nouveau_sched_cancel_job() the waitque is not necessary anymore. Remove the waitque. Signed-off-by: Philipp Stanner Acked-by: Danilo Krummrich --- drivers/gpu/drm/nouveau/nouveau_sched.c | 20 +++++++------------- drivers/gpu/drm/nouveau/nouveau_sched.h | 9 +++------ drivers/gpu/drm/nouveau/nouveau_uvmm.c | 8 ++++---- 3 files changed, 14 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_sched.c b/drivers/gpu/drm/nouv= eau/nouveau_sched.c index 2ec62059c351..7d9c3418e76b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sched.c +++ b/drivers/gpu/drm/nouveau/nouveau_sched.c @@ -122,11 +122,9 @@ nouveau_job_done(struct nouveau_job *job) { struct nouveau_sched *sched =3D job->sched; =20 - spin_lock(&sched->job.list.lock); + spin_lock(&sched->job_list.lock); list_del(&job->entry); - spin_unlock(&sched->job.list.lock); - - wake_up(&sched->job.wq); + spin_unlock(&sched->job_list.lock); } =20 void @@ -307,9 +305,9 @@ nouveau_job_submit(struct nouveau_job *job) } =20 /* Submit was successful; add the job to the schedulers job list. */ - spin_lock(&sched->job.list.lock); - list_add(&job->entry, &sched->job.list.head); - spin_unlock(&sched->job.list.lock); + spin_lock(&sched->job_list.lock); + list_add(&job->entry, &sched->job_list.head); + spin_unlock(&sched->job_list.lock); =20 drm_sched_job_arm(&job->base); job->done_fence =3D dma_fence_get(&job->base.s_fence->finished); @@ -460,9 +458,8 @@ nouveau_sched_init(struct nouveau_sched *sched, struct = nouveau_drm *drm, goto fail_sched; =20 mutex_init(&sched->mutex); - spin_lock_init(&sched->job.list.lock); - INIT_LIST_HEAD(&sched->job.list.head); - init_waitqueue_head(&sched->job.wq); + spin_lock_init(&sched->job_list.lock); + INIT_LIST_HEAD(&sched->job_list.head); =20 return 0; =20 @@ -502,9 +499,6 @@ nouveau_sched_fini(struct nouveau_sched *sched) struct drm_gpu_scheduler *drm_sched =3D &sched->base; struct drm_sched_entity *entity =3D &sched->entity; =20 - rmb(); /* for list_empty to work without lock */ - wait_event(sched->job.wq, list_empty(&sched->job.list.head)); - drm_sched_entity_fini(entity); drm_sched_fini(drm_sched); =20 diff --git a/drivers/gpu/drm/nouveau/nouveau_sched.h b/drivers/gpu/drm/nouv= eau/nouveau_sched.h index 20cd1da8db73..b98c3f0bef30 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sched.h +++ b/drivers/gpu/drm/nouveau/nouveau_sched.h @@ -103,12 +103,9 @@ struct nouveau_sched { struct mutex mutex; =20 struct { - struct { - struct list_head head; - spinlock_t lock; - } list; - struct wait_queue_head wq; - } job; + struct list_head head; + spinlock_t lock; + } job_list; }; =20 int nouveau_sched_create(struct nouveau_sched **psched, struct nouveau_drm= *drm, diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.c b/drivers/gpu/drm/nouve= au/nouveau_uvmm.c index 48f105239f42..ddfc46bc1b3e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_uvmm.c +++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.c @@ -1019,8 +1019,8 @@ bind_validate_map_sparse(struct nouveau_job *job, u64= addr, u64 range) u64 end =3D addr + range; =20 again: - spin_lock(&sched->job.list.lock); - list_for_each_entry(__job, &sched->job.list.head, entry) { + spin_lock(&sched->job_list.lock); + list_for_each_entry(__job, &sched->job_list.head, entry) { struct nouveau_uvmm_bind_job *bind_job =3D to_uvmm_bind_job(__job); =20 list_for_each_op(op, &bind_job->ops) { @@ -1030,7 +1030,7 @@ bind_validate_map_sparse(struct nouveau_job *job, u64= addr, u64 range) =20 if (!(end <=3D op_addr || addr >=3D op_end)) { nouveau_uvmm_bind_job_get(bind_job); - spin_unlock(&sched->job.list.lock); + spin_unlock(&sched->job_list.lock); wait_for_completion(&bind_job->complete); nouveau_uvmm_bind_job_put(bind_job); goto again; @@ -1038,7 +1038,7 @@ bind_validate_map_sparse(struct nouveau_job *job, u64= addr, u64 range) } } } - spin_unlock(&sched->job.list.lock); + spin_unlock(&sched->job_list.lock); } =20 static int --=20 2.49.0