AFS File-System Driver Overhauled For Linux 4.15
Written by Michael Larabel in Linux Storage on 13 November 2017 at 12:15 PM EST. 8 Comments
LINUX STORAGE --
Red Hat developers have been working on an overhaul of the AFS file-system's kernel driver for the just-opened Linux 4.15 kernel merge window.

Not known as well as the other Linux file-systems, AFS is the Andrew File-System developed by Carnegie Mellon University and part of the mainline tree since the Linux 2.6 days. AFS is a distributed file-system along the likes of GFS, GlusterFS, Ceph, etc. It's not too often these days during Linux kernel merge windows that there is much talk of the Andrew File-System.

David Howells of Red Hat has been spearheading this several thousand lines of code rework to the AFS kernel code. These changes for Linux 4.15 add the preliminary work towards supporting network-namespacing, various network-related changes, more passive callback handling, improvements around file access permit caching, improved memory usage, overhauling of volume caching, and file server record caching has also been changed around. There's also been a overhaul of the data writeback handling and a range of other low-level code changes. This work does end up removing support for pre-3.4 AFS servers, which were introduced in the late 90's.

AFS users can find more about all of these major changes via this pull request.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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