Commit 64419ca6 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

sched,msm: Convert to sched_set_fifo*() 



Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

Use sched_set_fifo(); Effectively changes prio from 16 to 50.

Cc: airlied@redhat.com
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarIngo Molnar <mingo@kernel.org>
parent 6e6d6efa

drivers/gpu/drm/msm/msm_drv.c

+1 −9
Original line number Diff line number Diff line
@@ -389,7 +389,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) 
	struct msm_kms *kms;

	struct msm_mdss *mdss;

	int ret, i;

	struct sched_param param;



	ddev = drm_dev_alloc(drv, dev);

	if (IS_ERR(ddev)) {
@@ -495,12 +494,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) 
	ddev->mode_config.funcs = &mode_config_funcs;

	ddev->mode_config.helper_private = &mode_config_helper_funcs;



	/**

	 * this priority was found during empiric testing to have appropriate

	 * realtime scheduling to process display updates and interact with

	 * other real time and normal priority task

	 */

	param.sched_priority = 16;

	for (i = 0; i < priv->num_crtcs; i++) {

		/* initialize event thread */

		priv->event_thread[i].crtc_id = priv->crtcs[i]->base.id;
@@ -516,8 +509,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) 
			goto err_msm_uninit;

		}



		ret = sched_setscheduler(priv->event_thread[i].thread,

					 SCHED_FIFO, &param);

		ret = sched_set_fifo(priv->event_thread[i].thread);

		if (ret)

			dev_warn(dev, "event_thread set priority failed:%d\n",

				 ret);

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