Multiple Read-Only Layers Added To OverlayFS

[phoronix]

Phoronix: Multiple Read-Only Layers Added To OverlayFS

OverlayFS was added to the Linux 3.18 kernel and for Linux 3.19 this file-system popular to live Linux distributions gained multi-layer support. For Linux 3.20 this file-system is now having support for multiple read-only layers...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-3.20-OverlayFS-Changes

[scooby]

Multiple layers in 3.19

Phoronix: Multiple Read-Only Layers Added To OverlayFS

OverlayFS was added to the Linux 3.18 kernel and for Linux 3.19 this file-system popular to live Linux distributions gained multi-layer support. For Linux 3.20 this file-system is now having support for multiple read-only layers...

http://www.phoronix.com/scan.php?pag...rlayFS-Changes

I am a little confused here

Does overlayfs in kernel 3.19 support multiple layers?

Or is it forst in 3.20 this will be offered?

[warped]

will it allow to boot disk-less, overlayfs based systems over NFS again?

Is this mean that 3.20 (a.k.a 4.0) will finally allow to boot disk-less, overlayfs based systems over NFS?
This was working OK for pre overlayfs merge (pre 3.18).