On Tue, Jul 13, 2021 at 07:23:14PM +0800, Qu Wenruo wrote:

On 2021/7/13 下午7:13, Christian Brauner wrote:

quoted

From: Christian Brauner <redacted>

Hey everyone,

This series enables the creation of idmapped mounts on btrfs.

Any doc on the "idmapped" part?

Yes, I've written a long manpage for it that hasn't been merged for
manpages yet. Things seem to move a little slow there currently:
https://lore.kernel.org/linux-man/20210301093459.1876707-1-christian.brauner@ubuntu.com/ (local)

For an easily readable version you can also see:
https://github.com/brauner/mount-idmapped

Not familiar with that, the only thing I can thing of is from NFSv4
idmapd, is that related or a completely new thing?

Unrelated.