Charles Jacobsen authored Apr 15, 2016 and Vikram Narayanan committed Dec 19, 2016

I wasn't acknowledging receipt of a couple responses, and the
async ipc buffer (the vfs tx buffer) slowly filled up after a
couple of test iterations.

But not all the way. It should be noted that if the async ipc
buffers are not big enough, you will get a deadlock. This is
because so many requests stay active before they are finally
ack'd with a response. This is due to the criss-crossing.