Quoting Chris Wilson (2018-01-30 15:44:12)
> @@ -4084,8 +4088,9 @@ i915_drop_caches_set(void *data, u64 val)
> drain_delayed_work(&dev_priv->gt.idle_work);
>
> if (val & DROP_FREED) {
> - synchronize_rcu();
> - i915_gem_drain_freed_objects(dev_priv);
> + synchronize_rcu_expedited();
So sync_rcu is not enough to process the call_rcu. Hmm.
-Chris
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