This flash storage optimized file-system has improvements around its discard/fstrim support, including the splitting of large discard commands for better responsiveness. There is also a new fsync_mode=nobarrier mount option available for reducing the number of cache flushes.
F2FS for Linux 4.18 also has improved sanity checks, various code clean-ups, and at least six known bug fixes.
The complete list of F2FS file-system changes for Linux 4.18 can be found via the kernel mailing list.
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