XFS File-System Updates For The Linux 4.9 Kernel

Dave Chinner has submitted his XFS file-system updates for the Linux 4.9 kernel. This time around most of the changes are internal to the open-source file-system rather than boasting new end-user features.

XFS for Linux 4.9 has improvements to the iomap-based DAX infrastructure, iomap fixes and changes, more efficient XFS delayed allocation using iomap, preparation patches for upcoming reflink support, and other prep changes and internal improvements.

Chinner commented in the pull request, "The main things in this update are the iomap-based DAX infrastructure, an XFS delalloc rework, and a chunk of fixes to how log recovery schedules writeback to prevent spurious corruption detections when recovery of certain items was not required. The other main chunk of code is some preparation for the upcoming reflink functionality. Most of it is generic and cleanups that stand alone, but they were ready and reviewed so are in this pull request."

Dave is hoping to send in the reflink work next week for XFS on Linux 4.9 still.