[PATCH 2/2] drm/i915/gvt: cancel scheduler timer when no vGPU exists

[Zhenyu Wang]

On 2018.01.18 05:45:34 +0000, Wang, Zhi A wrote:
> Reviewed-by: Zhi Wang <zhi.a.wang at intel.com>
>

Thanks for review!

> -----Original Message-----
> From: intel-gvt-dev [mailto:intel-gvt-dev-bounces at lists.freedesktop.org] On Behalf Of Zhenyu Wang
> Sent: Monday, January 15, 2018 10:36 AM
> To: intel-gvt-dev at lists.freedesktop.org
> Subject: [PATCH 2/2] drm/i915/gvt: cancel scheduler timer when no vGPU exists
> 
> Stop gvt scheduler timer if no vGPU exists, otherwise it keeps gvt service thread busy to handle request schedule event but no actual schedule activity required.
> 
> Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/gvt/sched_policy.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c
> index eea1a2f92099..d031f6486ce3 100644
> --- a/drivers/gpu/drm/i915/gvt/sched_policy.c
> +++ b/drivers/gpu/drm/i915/gvt/sched_policy.c
> @@ -308,8 +308,15 @@ static int tbs_sched_init_vgpu(struct intel_vgpu *vgpu)
>  
>  static void tbs_sched_clean_vgpu(struct intel_vgpu *vgpu)  {
> +	struct intel_gvt *gvt = vgpu->gvt;
> +	struct gvt_sched_data *sched_data = gvt->scheduler.sched_data;
> +
>  	kfree(vgpu->sched_data);
>  	vgpu->sched_data = NULL;
> +
> +	/* this vgpu id has been removed */
> +	if (idr_is_empty(&gvt->vgpu_idr))
> +		hrtimer_cancel(&sched_data->timer);
>  }
>  
>  static void tbs_sched_start_schedule(struct intel_vgpu *vgpu)
> --
> 2.15.1
> 
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