tree 36db6da2abfab4501c179abd35f7f484f330a7b9
parent d6bf387820be1843d3772065e9d78786c29132da
author Saurabh Shah <saurshah@codeaurora.org> 1377302804 -0700
committer Saurabh Shah <saurshah@codeaurora.org> 1377304247 -0700

overlay: Remove optimization that prevents garbage collection

There is an optimization to not do garbage collection (and thus UNSET)
if pipe usage hasn't change, added during older chip time frames.
It worked then because, continuous overlay failures were not normal,
and on failure userspace didn't UNSET remaining pipes.

On newer chips, owing to bandwidth limitations, continuous overlay
failures could happen, plus now we UNSET all other pipes. Thus each
round if GPU gets used, the optimization infers that pipe usage hasn't
changed and does not UNSET pipes.

Also the optimization doesn't do anything useful than saving a few
loops, but is suicidal in current situations, so can safely be done
away with.

Change-Id: I33bd64a599d8ade337707301188c94cf8e6aac81