F2FS Improvements Sent In For Linux 5.8 With LZO-RLE, New Compression Knobs

Written by Michael Larabel in Linux Storage on 10 June 2020 at 06:31 AM EDT. Add A Comment
Jaegeuk Kim has sent in the Flash-Friendly File-System (F2FS) improvements for the Linux 5.8 kernel.

The prominent new addition for F2FS in this next version of the Linux kernel is adding LZO-RLE to the available compression formats supported by this file-system. LZO Run-Length Encoding aims to offer similar compression ratios to LZO but with higher performance after the LZO-RLE implementation was contributed to the kernel last year by Arm.

F2FS LZO-RLE support has been in the works for several months and comes after F2FS added Zstd support and other compression methods to this flash focused file-system.

In addition to LZO-RLE support, F2FS is adding two new ioctls for releasing/reserving blocks for compression, support for partial truncation/fiemap on compressed files, sysfs entries to attach IO flags explicitly, and there are a wide variety of bug fixes also taken care of for this file-system driver.

The F2FS changes in full for Linux 5.8 are outlined via this pull request.
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