9be36c1d4b
Bug: b/123559319, b/112824791, b/120287622 (partially) Test: Android unit/integration tests, Linux unit tests, GTS tests on Taimen, GTS tests on Crosshatch Merge of http://go/wvgerrit/72483 This is a revert of http://go/ag/6216663. This addresses the failures that led to the seg faults in the 64 bit Level 3 library. Cache flushing must be done to the entire mmap'd page regardless of whether or not we use the entire page. Since we now have to cache flush the entire page, this gives us a performance hit due to us using the max page size. To get around this, we reuse mmap'd pages only for the 95th percentile page size or lower. Change-Id: I14bc0d7e21faae6b6816ea589ba25f9661dcec93