/boot on Btrfs still not supported, main problem is anaconda and grubby

[Chris Murphy]

This is interesting.

This patch for Anaconda runs grub2-mkconfig twice when media is live +
/boot is on Btrfs.
https://github.com/rhinstaller/anaconda/commit/0fc01e834082f20896728f330faea8e0b200a159

and fixes this blocker bug:

Boot fails because grub initrd entry isn't generated
https://bugzilla.redhat.com/show_bug.cgi?id=1200539

However, on a kernel upgrade I do still run into this:
https://bugzilla.redhat.com/show_bug.cgi?id=864198

So arguably since we're allowing /boot on Btrfs, 864198 could be seen
as a security risk if updated kernels neither appear nor are being
used at boot time?



Chris Murphy