[OpenWrt-Devel] Kernel 3.15 - zRAM LZ4 Compression

Fernando Frediani fhfrediani at gmail.com
Mon Dec 22 11:02:45 EST 2014

Perhaps someone have seen this from 3.15 notes that it now supports LZ4 for
zRAM Compression which increases the performance even more.

Is anyone extensively using it on their BB or CC builds and beleives this
would be significantlly benefitial or not that much ?

A note from the Kernel release:


1.7. zram: LZ4 compression support, improved performance

Zram is a memory compression mechanism added in Linux 3.14 that is used in
Android, Cyanogenmod, Chrome OS, Lubuntu and other projects. In this
release zram brings support for the LZ4 compression algorithm, which is
better than the current available LZO in some cases.

This release also adds performance improvements to concurrent compression
of multiple compression streams, and the ability to switch the compression
algorithm in /sys/block/zram0/comp_algorithm


Best regards,

Fernando Frediani
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