On 19 October 2016 at 09:12, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> For whatever reason, the gvt scheduler runs synchronously. At the very
> least, lets run synchronously without holding the struct_mutex.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gvt/scheduler.c | 13 ++++++-------
> 1 file changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
> index 4cedd3274da7..aa83dd3381a3 100644
> --- a/drivers/gpu/drm/i915/gvt/scheduler.c
> +++ b/drivers/gpu/drm/i915/gvt/scheduler.c
> @@ -420,10 +420,6 @@ static int workload_thread(void *priv)
>
> intel_runtime_pm_get(gvt->dev_priv);
>
> - /*
> - * Always take i915 big lock first
> - */
> - mutex_lock(&gvt->dev_priv->drm.struct_mutex);
>
> gvt_dbg_sched("ring id %d will dispatch workload %p\n",
> workload->ring_id, workload);
> @@ -432,7 +428,10 @@ static int workload_thread(void *priv)
> intel_uncore_forcewake_get(gvt->dev_priv,
> FORCEWAKE_ALL);
>
> + mutex_lock(&gvt->dev_priv->drm.struct_mutex);
> ret = dispatch_workload(workload);
> + mutex_lock(&gvt->dev_priv->drm.struct_mutex);
mutex_unlock...
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