This patch adds the option CONFIG_ZRAM_ENTROPY which calculates
the information entropy for each page. If the entropy is higher
than the CONFIG_ZRAM_ENTROPY_THRESHOLD parameter, then
the page is stored uncompressed.
This is some attempt to strike a balance between page processing
time and compression. This might be relevant for systems that can
lose a bit in compression and gain a lot in performance effort.
--
sysfs node added
473dd523a5