Kernel Log: Coming in 3.0 (Part 2) - Filesystems
Jun 22, 2011, 21:02 (0 Talkback[s])
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"The kernel hackers have optimised the Btrfs code and extended
it to include new functions; a substantially improved tool for
testing the experimental filesystem is soon to be released.
"Ext4 now supports the "punch hole" technology for deallocating
unused memory areas within a file."