State of the UBI fastmap feature

[Alexander Dahl]

Hello everyone,

after using UBI for almost 15 years now without fastmap, I'm currently
experimenting with that feature.  The help text in Kconfig menu
(drivers/mtd/ubi/Kconfig) still says "Experimental feature" and
further down:

> Important: this feature is experimental so far and the on-flash
> format for fastmap may change in the next kernel versions

Is this still the current state?  I can not remember seing any patches
touching fastmap in the last time.  Are there plans to stabilize this?
Will there be changes in the on-flash format?  Do folks even use this
feature?  In production?

Happy to get some opinions here.

Greets
Alex