[PATCH 7/8] drm/xe: Use DRM_GPU_SCHED_STAT_RUNNING to skip the reset

[Matthew Brost]

On Sat, May 03, 2025 at 05:59:58PM -0300, Maíra Canal wrote:
> Xe can skip the reset if TDR has fired before the free job worker. Instead
> of using the scheduler internals to add the job to the pending list, use
> the DRM_GPU_SCHED_STAT_RUNNING status to skip the reset and rearm the
> timer.
> 
> Note that there is no need to restart submission if it hasn't been
> stopped.
> 
> Signed-off-by: Maíra Canal <mcanal at igalia.com>
> ---
>  drivers/gpu/drm/xe/xe_guc_submit.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
> index 31bc2022bfc2d80f0ef54726dfeb8d7f8e6b32c8..4c40d3921d4a5e190d3413736a68c6e7295223dd 100644
> --- a/drivers/gpu/drm/xe/xe_guc_submit.c
> +++ b/drivers/gpu/drm/xe/xe_guc_submit.c
> @@ -1058,12 +1058,8 @@ guc_exec_queue_timedout_job(struct drm_sched_job *drm_job)
>  	 * list so job can be freed and kick scheduler ensuring free job is not
>  	 * lost.
>  	 */
> -	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags)) {
> -		xe_sched_add_pending_job(sched, job);
> -		xe_sched_submission_start(sched);
> -
> -		return DRM_GPU_SCHED_STAT_NOMINAL;
> -	}
> +	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags))
> +		return DRM_GPU_SCHED_STAT_RUNNING;

There are a couple of other calls to xe_sched_add_pending_job in this
function which I can believe can be dropped in favor of return
DRM_GPU_SCHED_STAT_RUNNING too.

Matt 

>  
>  	/* Kill the run_job entry point */
>  	xe_sched_submission_stop(sched);
> 
> -- 
> 2.49.0
>