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Multi-Layer Support Coming To OverlayFS In Linux 3.19

Written by Michael Larabel in Linux Kernel on 9 December 2014 at 09:32 AM EST. 1 Comment

OverlayFS was finally merged in Linux 3.18 and now for the Linux 3.19 merge window it's picking up another feature.

OverlayFS, which is mostly used as a union file-system by Live DVD/USB Linux distributions, with Linux 3.19 adds support for multiple read-only layers to OverlayFS. Beyond having support for multiple ready-only layers, the upper layer can be optionally made writable.

That's the only main change for OverlayFS in Linux 3.19. The pull request by Miklos Szeredi that does the few hundred lines of changes can be found via the Indiana kernel mailing list.

1 Comment

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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.