Unipolar Cached Decompression

configname: CONFIG_EROFS_FS_ZIP_CACHE_UNIPOLAR

EROFS VLE Data Decompression mode
└─>Unipolar Cached Decompression
In linux kernel since version 4.2 (release Date: 2015-08-30)  
For each request, it caches the last compressed page
for further reading.
It still decompresses in place for the rest compressed pages.