Comment # 3 on bug 899263 from Rich Coe

during install of mdadm and lvm2, the rpm call mkinitrd to build a new boot
image.

During mkinitrd, it complains about btrfs not existing, presumbably because it
has not been installed yet.

I didn't see anything that causes mkinitrd to be called again, so I suspect
whatever in the rpm is executing is calling it repeatedly.

I'm attaching the mkinitrd.log.