[PATCH v3 33/38] ext4: support idmapped mounts

[Christoph Hellwig]

On Tue, Dec 01, 2020 at 12:02:19PM +0100, Christian Brauner wrote:
> On Tue, Dec 01, 2020 at 11:54:45AM +0100, Christoph Hellwig wrote:
> > What is the reason for the config option?  The only thing that it
> > controls is setting of a single flag.
> 
> I wanted to be conservative and give users the option to disable this on
> their kernel. Would you prefer if I drop it?

I don't think adding an option per file system scales in any way.  If
there is some strong urge to disable the functionality (which I see no
reason for) we could add something like a global sysctl for all on-disk
file systems.