Hi,
I have two questions regarding writing custom backward.
1- Can I add a list of tensors to ctx.save_for_backward? I need to have a list of  24 activation outputs in my backward function.
2- Can I output something in the custom backward function? Let’s say I have a second copy of the model and would like to copy gradients in backward to that. How can I get gradients in the second model when calling loss.backward()