Re: [PATCH v4 3/5] drm/scheduler: rework job destruction

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Am 17.04.19 um 20:29 schrieb Grodzovsky, Andrey:
> On 4/17/19 2:01 PM, Koenig, Christian wrote:
>> Am 17.04.19 um 19:59 schrieb Christian König:
>>> Am 17.04.19 um 19:53 schrieb Grodzovsky, Andrey:
>>>> On 4/17/19 1:17 PM, Christian König wrote:
>>>>> I can't review this patch, since I'm one of the authors of it, but in
>>>>> general your changes look good to me now.
>>>>>
>>>>> For patch #5 I think it might be cleaner if we move incrementing of
>>>>> the hw_rq_count while starting the scheduler again.
>>>> But the increment of  hw_rq_count is conditional on if the guilty job
>>>> was signaled, moving it into drm_sched_start will also force me to pass
>>>> 'job_signaled' flag into drm_sched_start which is against your original
>>>> comment that we don't want to pass this logic around helper functions
>>>> and keep it all in one place which is amdgpu_device_gpu_recover.
>>> Well I hope that incrementing hw_rq_count is conditional for signaled
>>> jobs anyway, or otherwise we would seriously mess up the counter.
>>>
>>> E.g. in drm_sched_stop() we also only decrement it when we where able
>>> to remove the callback.
>> Ok, checking the code again we don't need any special handling here
>> since all signaled jobs are already removed from the mirror_list.
>>
>> Christian.
> We decrement in drm_sched_stop and then later if the guilty job is found
> to be signaled we are skipping drm_sched_resubmit_jobs and so will not
> increment back and then the count becomes 'negative' when the fence
> signals and i got a bug. But now i think what i need is to just move the
> atomic_inc(&sched->hw_rq_count) from drm_sched_resubmit_jobs into
> drm_sched_start and so this way i can get rid of the conditional
> re-incriment i am doing now. Agree ?

Yes, exactly what I had in mind after checking the code once more as well.

Christian.

>
> Andrey
>
>>> Christian.
>>>
>>>> Andrey
>>>>
>>>>
>>>>> Regards,
>>>>> Christian.
>>>>>
>>>>> Am 17.04.19 um 16:36 schrieb Grodzovsky, Andrey:
>>>>>> Ping on this patch and patch 5. The rest already RBed.
>>>>>>
>>>>>> Andrey
>>>>>>
>>>>>> On 4/16/19 2:23 PM, Andrey Grodzovsky wrote:
>>>>>>> From: Christian König <christian.koenig@xxxxxxx>
>>>>>>>
>>>>>>> We now destroy finished jobs from the worker thread to make sure that
>>>>>>> we never destroy a job currently in timeout processing.
>>>>>>> By this we avoid holding lock around ring mirror list in
>>>>>>> drm_sched_stop
>>>>>>> which should solve a deadlock reported by a user.
>>>>>>>
>>>>>>> v2: Remove unused variable.
>>>>>>> v4: Move guilty job free into sched code.
>>>>>>>
>>>>>>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109692
>>>>>>>
>>>>>>> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
>>>>>>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
>>>>>>> ---
>>>>>>>       drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |   9 +-
>>>>>>>       drivers/gpu/drm/etnaviv/etnaviv_dump.c     |   4 -
>>>>>>>       drivers/gpu/drm/etnaviv/etnaviv_sched.c    |   2 +-
>>>>>>>       drivers/gpu/drm/lima/lima_sched.c          |   2 +-
>>>>>>>       drivers/gpu/drm/panfrost/panfrost_job.c    |   2 +-
>>>>>>>       drivers/gpu/drm/scheduler/sched_main.c     | 145
>>>>>>> +++++++++++++++++------------
>>>>>>>       drivers/gpu/drm/v3d/v3d_sched.c            |   2 +-
>>>>>>>       include/drm/gpu_scheduler.h                |   6 +-
>>>>>>>       8 files changed, 94 insertions(+), 78 deletions(-)
>>>>>>>
>>>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>>>> index 7cee269..a0e165c 100644
>>>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>>>> @@ -3334,7 +3334,7 @@ static int amdgpu_device_pre_asic_reset(struct
>>>>>>> amdgpu_device *adev,
>>>>>>>               if (!ring || !ring->sched.thread)
>>>>>>>                   continue;
>>>>>>>       -        drm_sched_stop(&ring->sched);
>>>>>>> +        drm_sched_stop(&ring->sched, &job->base);
>>>>>>>                  /* after all hw jobs are reset, hw fence is
>>>>>>> meaningless, so force_completion */
>>>>>>>               amdgpu_fence_driver_force_completion(ring);
>>>>>>> @@ -3343,8 +3343,6 @@ static int amdgpu_device_pre_asic_reset(struct
>>>>>>> amdgpu_device *adev,
>>>>>>>           if(job)
>>>>>>>               drm_sched_increase_karma(&job->base);
>>>>>>>       -
>>>>>>> -
>>>>>>>           if (!amdgpu_sriov_vf(adev)) {
>>>>>>>                  if (!need_full_reset)
>>>>>>> @@ -3482,8 +3480,7 @@ static int amdgpu_do_asic_reset(struct
>>>>>>> amdgpu_hive_info *hive,
>>>>>>>           return r;
>>>>>>>       }
>>>>>>>       -static void amdgpu_device_post_asic_reset(struct amdgpu_device
>>>>>>> *adev,
>>>>>>> -                      struct amdgpu_job *job)
>>>>>>> +static void amdgpu_device_post_asic_reset(struct amdgpu_device
>>>>>>> *adev)
>>>>>>>       {
>>>>>>>           int i;
>>>>>>>       @@ -3623,7 +3620,7 @@ int amdgpu_device_gpu_recover(struct
>>>>>>> amdgpu_device *adev,
>>>>>>>              /* Post ASIC reset for all devs .*/
>>>>>>>           list_for_each_entry(tmp_adev, device_list_handle,
>>>>>>> gmc.xgmi.head) {
>>>>>>> -        amdgpu_device_post_asic_reset(tmp_adev, tmp_adev == adev ?
>>>>>>> job : NULL);
>>>>>>> +        amdgpu_device_post_asic_reset(tmp_adev);
>>>>>>>                  if (r) {
>>>>>>>                   /* bad news, how to tell it to userspace ? */
>>>>>>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
>>>>>>> b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
>>>>>>> index 33854c9..5778d9c 100644
>>>>>>> --- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
>>>>>>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
>>>>>>> @@ -135,13 +135,11 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu)
>>>>>>>                   mmu_size + gpu->buffer.size;
>>>>>>>              /* Add in the active command buffers */
>>>>>>> -    spin_lock_irqsave(&gpu->sched.job_list_lock, flags);
>>>>>>>           list_for_each_entry(s_job, &gpu->sched.ring_mirror_list,
>>>>>>> node) {
>>>>>>>               submit = to_etnaviv_submit(s_job);
>>>>>>>               file_size += submit->cmdbuf.size;
>>>>>>>               n_obj++;
>>>>>>>           }
>>>>>>> - spin_unlock_irqrestore(&gpu->sched.job_list_lock, flags);
>>>>>>>              /* Add in the active buffer objects */
>>>>>>>           list_for_each_entry(vram, &gpu->mmu->mappings, mmu_node) {
>>>>>>> @@ -183,14 +181,12 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu)
>>>>>>>                         gpu->buffer.size,
>>>>>>> etnaviv_cmdbuf_get_va(&gpu->buffer));
>>>>>>>       - spin_lock_irqsave(&gpu->sched.job_list_lock, flags);
>>>>>>>           list_for_each_entry(s_job, &gpu->sched.ring_mirror_list,
>>>>>>> node) {
>>>>>>>               submit = to_etnaviv_submit(s_job);
>>>>>>>               etnaviv_core_dump_mem(&iter, ETDUMP_BUF_CMD,
>>>>>>>                             submit->cmdbuf.vaddr, submit->cmdbuf.size,
>>>>>>> etnaviv_cmdbuf_get_va(&submit->cmdbuf));
>>>>>>>           }
>>>>>>> - spin_unlock_irqrestore(&gpu->sched.job_list_lock, flags);
>>>>>>>              /* Reserve space for the bomap */
>>>>>>>           if (n_bomap_pages) {
>>>>>>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>>>> b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>>>> index 6d24fea..a813c82 100644
>>>>>>> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>>>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>>>> @@ -109,7 +109,7 @@ static void etnaviv_sched_timedout_job(struct
>>>>>>> drm_sched_job *sched_job)
>>>>>>>           }
>>>>>>>              /* block scheduler */
>>>>>>> -    drm_sched_stop(&gpu->sched);
>>>>>>> +    drm_sched_stop(&gpu->sched, sched_job);
>>>>>>>              if(sched_job)
>>>>>>>               drm_sched_increase_karma(sched_job);
>>>>>>> diff --git a/drivers/gpu/drm/lima/lima_sched.c
>>>>>>> b/drivers/gpu/drm/lima/lima_sched.c
>>>>>>> index 97bd9c1..df98931 100644
>>>>>>> --- a/drivers/gpu/drm/lima/lima_sched.c
>>>>>>> +++ b/drivers/gpu/drm/lima/lima_sched.c
>>>>>>> @@ -300,7 +300,7 @@ static struct dma_fence
>>>>>>> *lima_sched_run_job(struct drm_sched_job *job)
>>>>>>>       static void lima_sched_handle_error_task(struct lima_sched_pipe
>>>>>>> *pipe,
>>>>>>>                            struct lima_sched_task *task)
>>>>>>>       {
>>>>>>> -    drm_sched_stop(&pipe->base);
>>>>>>> +    drm_sched_stop(&pipe->base, &task->base);
>>>>>>>              if (task)
>>>>>>>               drm_sched_increase_karma(&task->base);
>>>>>>> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c
>>>>>>> b/drivers/gpu/drm/panfrost/panfrost_job.c
>>>>>>> index 0a7ed04..c6336b7 100644
>>>>>>> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
>>>>>>> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
>>>>>>> @@ -385,7 +385,7 @@ static void panfrost_job_timedout(struct
>>>>>>> drm_sched_job *sched_job)
>>>>>>>               sched_job);
>>>>>>>              for (i = 0; i < NUM_JOB_SLOTS; i++)
>>>>>>> - drm_sched_stop(&pfdev->js->queue[i].sched);
>>>>>>> + drm_sched_stop(&pfdev->js->queue[i].sched, sched_job);
>>>>>>>              if (sched_job)
>>>>>>>               drm_sched_increase_karma(sched_job);
>>>>>>> diff --git a/drivers/gpu/drm/scheduler/sched_main.c
>>>>>>> b/drivers/gpu/drm/scheduler/sched_main.c
>>>>>>> index 19fc601..21e8734 100644
>>>>>>> --- a/drivers/gpu/drm/scheduler/sched_main.c
>>>>>>> +++ b/drivers/gpu/drm/scheduler/sched_main.c
>>>>>>> @@ -265,32 +265,6 @@ void drm_sched_resume_timeout(struct
>>>>>>> drm_gpu_scheduler *sched,
>>>>>>>       }
>>>>>>>       EXPORT_SYMBOL(drm_sched_resume_timeout);
>>>>>>>       -/* job_finish is called after hw fence signaled
>>>>>>> - */
>>>>>>> -static void drm_sched_job_finish(struct work_struct *work)
>>>>>>> -{
>>>>>>> -    struct drm_sched_job *s_job = container_of(work, struct
>>>>>>> drm_sched_job,
>>>>>>> -                           finish_work);
>>>>>>> -    struct drm_gpu_scheduler *sched = s_job->sched;
>>>>>>> -    unsigned long flags;
>>>>>>> -
>>>>>>> -    /*
>>>>>>> -     * Canceling the timeout without removing our job from the ring
>>>>>>> mirror
>>>>>>> -     * list is safe, as we will only end up in this worker if our
>>>>>>> jobs
>>>>>>> -     * finished fence has been signaled. So even if some another
>>>>>>> worker
>>>>>>> -     * manages to find this job as the next job in the list, the
>>>>>>> fence
>>>>>>> -     * signaled check below will prevent the timeout to be
>>>>>>> restarted.
>>>>>>> -     */
>>>>>>> -    cancel_delayed_work_sync(&sched->work_tdr);
>>>>>>> -
>>>>>>> -    spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> -    /* queue TDR for next job */
>>>>>>> -    drm_sched_start_timeout(sched);
>>>>>>> -    spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> -
>>>>>>> -    sched->ops->free_job(s_job);
>>>>>>> -}
>>>>>>> -
>>>>>>>       static void drm_sched_job_begin(struct drm_sched_job *s_job)
>>>>>>>       {
>>>>>>>           struct drm_gpu_scheduler *sched = s_job->sched;
>>>>>>> @@ -315,6 +289,13 @@ static void drm_sched_job_timedout(struct
>>>>>>> work_struct *work)
>>>>>>>           if (job)
>>>>>>>               job->sched->ops->timedout_job(job);
>>>>>>>       +    /*
>>>>>>> +     * Guilty job did complete and hence needs to be manually
>>>>>>> removed
>>>>>>> +     * See drm_sched_stop doc.
>>>>>>> +     */
>>>>>>> +    if (list_empty(&job->node))
>>>>>>> +        job->sched->ops->free_job(job);
>>>>>>> +
>>>>>>>           spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>>           drm_sched_start_timeout(sched);
>>>>>>> spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> @@ -371,23 +352,26 @@ EXPORT_SYMBOL(drm_sched_increase_karma);
>>>>>>>        * @sched: scheduler instance
>>>>>>>        * @bad: bad scheduler job
>>>>>>>        *
>>>>>>> + * Stop the scheduler and also removes and frees all completed jobs.
>>>>>>> + * Note: bad job will not be freed as it might be used later and so
>>>>>>> it's
>>>>>>> + * callers responsibility to release it manually if it's not part
>>>>>>> of the
>>>>>>> + * mirror list any more.
>>>>>>> + *
>>>>>>>        */
>>>>>>> -void drm_sched_stop(struct drm_gpu_scheduler *sched)
>>>>>>> +void drm_sched_stop(struct drm_gpu_scheduler *sched, struct
>>>>>>> drm_sched_job *bad)
>>>>>>>       {
>>>>>>> -    struct drm_sched_job *s_job;
>>>>>>> +    struct drm_sched_job *s_job, *tmp;
>>>>>>>           unsigned long flags;
>>>>>>> -    struct dma_fence *last_fence =  NULL;
>>>>>>>              kthread_park(sched->thread);
>>>>>>>              /*
>>>>>>> -     * Verify all the signaled jobs in mirror list are removed from
>>>>>>> the ring
>>>>>>> -     * by waiting for the latest job to enter the list. This should
>>>>>>> insure that
>>>>>>> -     * also all the previous jobs that were in flight also already
>>>>>>> singaled
>>>>>>> -     * and removed from the list.
>>>>>>> +     * Iterate the job list from later to  earlier one and either
>>>>>>> deactive
>>>>>>> +     * their HW callbacks or remove them from mirror list if they
>>>>>>> already
>>>>>>> +     * signaled.
>>>>>>> +     * This iteration is thread safe as sched thread is stopped.
>>>>>>>            */
>>>>>>> -    spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> -    list_for_each_entry_reverse(s_job, &sched->ring_mirror_list,
>>>>>>> node) {
>>>>>>> +    list_for_each_entry_safe_reverse(s_job, tmp,
>>>>>>> &sched->ring_mirror_list, node) {
>>>>>>>               if (s_job->s_fence->parent &&
>>>>>>> dma_fence_remove_callback(s_job->s_fence->parent,
>>>>>>>                                 &s_job->cb)) {
>>>>>>> @@ -395,16 +379,30 @@ void drm_sched_stop(struct drm_gpu_scheduler
>>>>>>> *sched)
>>>>>>>                   s_job->s_fence->parent = NULL;
>>>>>>>                   atomic_dec(&sched->hw_rq_count);
>>>>>>>               } else {
>>>>>>> -             last_fence = dma_fence_get(&s_job->s_fence->finished);
>>>>>>> -             break;
>>>>>>> +            /*
>>>>>>> +             * remove job from ring_mirror_list.
>>>>>>> +             * Locking here is for concurrent resume timeout
>>>>>>> +             */
>>>>>>> + spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> +            list_del_init(&s_job->node);
>>>>>>> + spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> +
>>>>>>> +            /*
>>>>>>> +             * Wait for job's HW fence callback to finish using
>>>>>>> s_job
>>>>>>> +             * before releasing it.
>>>>>>> +             *
>>>>>>> +             * Job is still alive so fence refcount at least 1
>>>>>>> +             */
>>>>>>> + dma_fence_wait(&s_job->s_fence->finished, false);
>>>>>>> +
>>>>>>> +            /*
>>>>>>> +             * We must keep bad job alive for later use during
>>>>>>> +             * recovery by some of the drivers
>>>>>>> +             */
>>>>>>> +            if (bad != s_job)
>>>>>>> +                sched->ops->free_job(s_job);
>>>>>>>               }
>>>>>>>           }
>>>>>>> -    spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> -
>>>>>>> -    if (last_fence) {
>>>>>>> -        dma_fence_wait(last_fence, false);
>>>>>>> -        dma_fence_put(last_fence);
>>>>>>> -    }
>>>>>>>       }
>>>>>>>          EXPORT_SYMBOL(drm_sched_stop);
>>>>>>> @@ -418,6 +416,7 @@ EXPORT_SYMBOL(drm_sched_stop);
>>>>>>>       void drm_sched_start(struct drm_gpu_scheduler *sched, bool
>>>>>>> full_recovery)
>>>>>>>       {
>>>>>>>           struct drm_sched_job *s_job, *tmp;
>>>>>>> +    unsigned long flags;
>>>>>>>           int r;
>>>>>>>              if (!full_recovery)
>>>>>>> @@ -425,9 +424,7 @@ void drm_sched_start(struct drm_gpu_scheduler
>>>>>>> *sched, bool full_recovery)
>>>>>>>              /*
>>>>>>>            * Locking the list is not required here as the sched thread
>>>>>>> is parked
>>>>>>> -     * so no new jobs are being pushed in to HW and in
>>>>>>> drm_sched_stop we
>>>>>>> -     * flushed all the jobs who were still in mirror list but who
>>>>>>> already
>>>>>>> -     * signaled and removed them self from the list. Also concurrent
>>>>>>> +     * so no new jobs are being inserted or removed. Also concurrent
>>>>>>>            * GPU recovers can't run in parallel.
>>>>>>>            */
>>>>>>>           list_for_each_entry_safe(s_job, tmp,
>>>>>>> &sched->ring_mirror_list, node) {
>>>>>>> @@ -445,7 +442,9 @@ void drm_sched_start(struct drm_gpu_scheduler
>>>>>>> *sched, bool full_recovery)
>>>>>>>                   drm_sched_process_job(NULL, &s_job->cb);
>>>>>>>           }
>>>>>>>       +    spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>>           drm_sched_start_timeout(sched);
>>>>>>> +    spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>>          unpark:
>>>>>>>           kthread_unpark(sched->thread);
>>>>>>> @@ -464,7 +463,6 @@ void drm_sched_resubmit_jobs(struct
>>>>>>> drm_gpu_scheduler *sched)
>>>>>>>           uint64_t guilty_context;
>>>>>>>           bool found_guilty = false;
>>>>>>>       -    /*TODO DO we need spinlock here ? */
>>>>>>>           list_for_each_entry_safe(s_job, tmp,
>>>>>>> &sched->ring_mirror_list, node) {
>>>>>>>               struct drm_sched_fence *s_fence = s_job->s_fence;
>>>>>>>       @@ -514,7 +512,6 @@ int drm_sched_job_init(struct drm_sched_job
>>>>>>> *job,
>>>>>>>               return -ENOMEM;
>>>>>>>           job->id = atomic64_inc_return(&sched->job_id_count);
>>>>>>>       -    INIT_WORK(&job->finish_work, drm_sched_job_finish);
>>>>>>>           INIT_LIST_HEAD(&job->node);
>>>>>>>              return 0;
>>>>>>> @@ -597,24 +594,53 @@ static void drm_sched_process_job(struct
>>>>>>> dma_fence *f, struct dma_fence_cb *cb)
>>>>>>>           struct drm_sched_job *s_job = container_of(cb, struct
>>>>>>> drm_sched_job, cb);
>>>>>>>           struct drm_sched_fence *s_fence = s_job->s_fence;
>>>>>>>           struct drm_gpu_scheduler *sched = s_fence->sched;
>>>>>>> -    unsigned long flags;
>>>>>>> -
>>>>>>> -    cancel_delayed_work(&sched->work_tdr);
>>>>>>>              atomic_dec(&sched->hw_rq_count);
>>>>>>>           atomic_dec(&sched->num_jobs);
>>>>>>>       -    spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> -    /* remove job from ring_mirror_list */
>>>>>>> -    list_del_init(&s_job->node);
>>>>>>> -    spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> +    trace_drm_sched_process_job(s_fence);
>>>>>>>              drm_sched_fence_finished(s_fence);
>>>>>>> -
>>>>>>> -    trace_drm_sched_process_job(s_fence);
>>>>>>> wake_up_interruptible(&sched->wake_up_worker);
>>>>>>> +}
>>>>>>> +
>>>>>>> +/**
>>>>>>> + * drm_sched_cleanup_jobs - destroy finished jobs
>>>>>>> + *
>>>>>>> + * @sched: scheduler instance
>>>>>>> + *
>>>>>>> + * Remove all finished jobs from the mirror list and destroy them.
>>>>>>> + */
>>>>>>> +static void drm_sched_cleanup_jobs(struct drm_gpu_scheduler *sched)
>>>>>>> +{
>>>>>>> +    unsigned long flags;
>>>>>>> +
>>>>>>> +    /* Don't destroy jobs while the timeout worker is running */
>>>>>>> +    if (!cancel_delayed_work(&sched->work_tdr))
>>>>>>> +        return;
>>>>>>> +
>>>>>>> +
>>>>>>> +    while (!list_empty(&sched->ring_mirror_list)) {
>>>>>>> +        struct drm_sched_job *job;
>>>>>>> +
>>>>>>> +        job = list_first_entry(&sched->ring_mirror_list,
>>>>>>> +                       struct drm_sched_job, node);
>>>>>>> +        if (!dma_fence_is_signaled(&job->s_fence->finished))
>>>>>>> +            break;
>>>>>>> +
>>>>>>> +        spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> +        /* remove job from ring_mirror_list */
>>>>>>> +        list_del_init(&job->node);
>>>>>>> + spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>> +
>>>>>>> +        sched->ops->free_job(job);
>>>>>>> +    }
>>>>>>> +
>>>>>>> +    /* queue timeout for next job */
>>>>>>> +    spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>>>> +    drm_sched_start_timeout(sched);
>>>>>>> +    spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>>>>       -    schedule_work(&s_job->finish_work);
>>>>>>>       }
>>>>>>>          /**
>>>>>>> @@ -656,9 +682,10 @@ static int drm_sched_main(void *param)
>>>>>>>               struct dma_fence *fence;
>>>>>>> wait_event_interruptible(sched->wake_up_worker,
>>>>>>> +                     (drm_sched_cleanup_jobs(sched),
>>>>>>>                            (!drm_sched_blocked(sched) &&
>>>>>>>                             (entity =
>>>>>>> drm_sched_select_entity(sched))) ||
>>>>>>> -                     kthread_should_stop());
>>>>>>> +                     kthread_should_stop()));
>>>>>>>                  if (!entity)
>>>>>>>                   continue;
>>>>>>> diff --git a/drivers/gpu/drm/v3d/v3d_sched.c
>>>>>>> b/drivers/gpu/drm/v3d/v3d_sched.c
>>>>>>> index e740f3b..1a4abe7 100644
>>>>>>> --- a/drivers/gpu/drm/v3d/v3d_sched.c
>>>>>>> +++ b/drivers/gpu/drm/v3d/v3d_sched.c
>>>>>>> @@ -232,7 +232,7 @@ v3d_gpu_reset_for_timeout(struct v3d_dev *v3d,
>>>>>>> struct drm_sched_job *sched_job)
>>>>>>>              /* block scheduler */
>>>>>>>           for (q = 0; q < V3D_MAX_QUEUES; q++)
>>>>>>> -        drm_sched_stop(&v3d->queue[q].sched);
>>>>>>> +        drm_sched_stop(&v3d->queue[q].sched, sched_job);
>>>>>>>              if (sched_job)
>>>>>>>               drm_sched_increase_karma(sched_job);
>>>>>>> diff --git a/include/drm/gpu_scheduler.h
>>>>>>> b/include/drm/gpu_scheduler.h
>>>>>>> index 0daca4d..9ee0f27 100644
>>>>>>> --- a/include/drm/gpu_scheduler.h
>>>>>>> +++ b/include/drm/gpu_scheduler.h
>>>>>>> @@ -167,9 +167,6 @@ struct drm_sched_fence
>>>>>>> *to_drm_sched_fence(struct dma_fence *f);
>>>>>>>        * @sched: the scheduler instance on which this job is scheduled.
>>>>>>>        * @s_fence: contains the fences for the scheduling of job.
>>>>>>>        * @finish_cb: the callback for the finished fence.
>>>>>>> - * @finish_work: schedules the function @drm_sched_job_finish once
>>>>>>> the job has
>>>>>>> - *               finished to remove the job from the
>>>>>>> - *               @drm_gpu_scheduler.ring_mirror_list.
>>>>>>>        * @node: used to append this struct to the
>>>>>>> @drm_gpu_scheduler.ring_mirror_list.
>>>>>>>        * @id: a unique id assigned to each job scheduled on the
>>>>>>> scheduler.
>>>>>>>        * @karma: increment on every hang caused by this job. If this
>>>>>>> exceeds the hang
>>>>>>> @@ -188,7 +185,6 @@ struct drm_sched_job {
>>>>>>>           struct drm_gpu_scheduler    *sched;
>>>>>>>           struct drm_sched_fence        *s_fence;
>>>>>>>           struct dma_fence_cb        finish_cb;
>>>>>>> -    struct work_struct        finish_work;
>>>>>>>           struct list_head        node;
>>>>>>>           uint64_t            id;
>>>>>>>           atomic_t            karma;
>>>>>>> @@ -296,7 +292,7 @@ int drm_sched_job_init(struct drm_sched_job *job,
>>>>>>>                      void *owner);
>>>>>>>       void drm_sched_job_cleanup(struct drm_sched_job *job);
>>>>>>>       void drm_sched_wakeup(struct drm_gpu_scheduler *sched);
>>>>>>> -void drm_sched_stop(struct drm_gpu_scheduler *sched);
>>>>>>> +void drm_sched_stop(struct drm_gpu_scheduler *sched, struct
>>>>>>> drm_sched_job *bad);
>>>>>>>       void drm_sched_start(struct drm_gpu_scheduler *sched, bool
>>>>>>> full_recovery);
>>>>>>>       void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched);
>>>>>>>       void drm_sched_increase_karma(struct drm_sched_job *bad);
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