On Sat, 19 Sep 2020 12:37:26 -0700 Rob Clark wrote:
> +/**
> + * drm_crtc_set_sched_mode:
> + * @dev: DRM device
> + * @mode: one of DRM_CLIENT_CAP_SCHED_x
> + *
> + * Set the scheduling mode for per-CRTC kthread workers. This controls
> + * whether nonblocking atomic commits will run with SCHED_NORMAL or
> + * SCHED_FIFO (rt) priority.
> + */
> +void drm_crtc_set_sched_mode(struct drm_device *dev, int mode)
> +{
> + struct drm_crtc *crtc;
> +
> + drm_for_each_crtc(crtc, dev) {
> + switch (mode) {
> + case DRM_CLIENT_CAP_SCHED_NORMAL:
> + /* zero is default nice value for kthreads: */
> + sched_set_normal(crtc->worker->task, 0);
> + break;
> + case DRM_CLIENT_CAP_SCHED_FIFO:
> + sched_set_fifo(crtc->worker->task);
> + break;
Better if they are done in kernel/kthread.c wrt FIFO worker.
Off-topic: if that's fine, what's preventing you from doing the same
in kernel/workqueue.c for the workqueus you create manually?
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