scheduler choose wrong pool

Consider the following scenario:
1. A pool reports it's capability "thin_provision=[True, False]", "max_over_subscription_ratio=20";
2.The free capacity of the pool is 1GB;
3.Create a share with size=5GB, share type contain "capabilities:thin_provision=<is> False"

The scheduler will choose this pool to create the 5GB share, but the free capacity is only 1GB.
The reason of this failure is that the scheduler will multiply free capacity by max_over_subscription_ratio when the capability of the pool contains "thin_provision=True". That means the pool is able to create 1x20=20GB thin share.

But in the scenario above, user want to create a share which is not thin.

So, maybe it's better to add a rule to the scheduler that the max_over_subscription_ratio is used ony the following two conditions are both met:
1. The capability of the pool contains "thin_provision=True";
2. The share type contains "capabilities:thin_provision=<is> True"