Btrfs Changes For Linux 4.21 Prepped With Swapfile Support, Logging Improvements

Due to the Linux 4.21 merge window expected to open up next week just prior to Christmas, some kernel subsystem maintainers who won't be around in the days ahead have been sending in their pull requests early. Among those with early feature pulls is David Sterba continuing to oversee the Btrfs file-system development...