OverlayFS Can Be Paired With VirtIO-FS On Linux 5.7

Written by Michael Larabel in Linux Storage on 8 April 2020 at 07:00 AM EDT. Add A Comment
The OverlayFS union mount file-system has a number of fixes and other changes with Linux 5.7.

Notable to OverlayFS in the Linux 5.7 kernel is support for allowing a remote upper file-system, which in step with other changes allow for VirtIO-FS to be used as an upper layer. VirtIO-FS is the shared file-system for allowing VMs to access a directory on the host and is supported by most of the open-source Linux virtualization components. Up to now though VirtIO-FS hasn't worked as an upper (writable) layer in an OverlayFS configuration while now that is possible.

OverlayFS also now uses more consistent inode numbering, fixing a failure to copy-up files from some NFSv4 mounts, and other changes as outlined 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 20,000 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, LinkedIn, or contacted via MichaelLarabel.com.

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