On Tue, Sep 17, 2019 at 07:34:25PM +0100, Dr. David Alan Gilbert wrote:
> * Al Viro (viro@zeniv.linux.org.uk) wrote:
> > On Tue, Sep 17, 2019 at 08:19:55PM +0200, Richard Weinberger wrote:
> > 
> > > mtd, ubi, virtiofs and 9p have one thing in common, they are not block devices.
> > > What about a new miscroot= kernel parameter?
> > 
> > How about something like xfs!sda5 or nfs!foo.local.net/bar, etc.?  With
> > ubi et.al. covered by the same syntax...
> 
> Would Stefan's patch work if there was just a way to test for non-block
> based fileystsmes and we replaced
>    !strcmp(root_fs_names, "virtiofs") by
>    not_block_based_fs(root_fs_names)
> 
> Or is there some magic that the other filesystems do that's specific?

I will try this.

Stefan