xfsprogs 4.16.0 format change, GRUB error unknown filesystem

[Chris Murphy]

Hi,

xfsprogs 4.16.0 defaults to enabling "sparse inode" which is not
compatible with GRUB.

Downstream bug in Fedora, grub-probe fails so grub-install can't work;
and on systems with an already properly installed core.img with XFS
support, it can't read an XFS file system with this feature set.
https://bugzilla.redhat.com/show_bug.cgi?id=1575797

Make them default
https://www.spinics.net/lists/linux-xfs/msg16598.html

Change description, page 48
https://mirrors.edge.kernel.org/pub/linux/utils/fs/xfs/docs/xfs_filesystem_structure.pdf

It'd be helpful to know the approximate time frame for getting this
fixed, to know whether for Fedora 29 /boot on XFS should be inhibited
until a proper tested patch for GRUB exists.

Thanks,


-- 
Chris Murphy