Hello,
2014-04-29 14:48 GMT+02:00 Jaroslav Reznik <jreznik@redhat.com>:
= Proposed Self Contained Change: LVM Cache Logical Volumes =
https://fedoraproject.org/wiki/Changes/Cache_Logical_Volumes
 
* Other developers: N/A (not a System Wide Change)
<non-empty content> ... so this might be a system-wide change after all?  Anyway, this is mostly for dracut, and ...

The dracut team must provide boot support.  If dracut does not provide
support, cache LVs will not be usable as root devices.
This implies a fairly significant feature impact, while...
<snip>

== Contingency Plan ==
Dracut: There is already a hardcoded dm-cache installation. If the detection is not done in time, it will work as is.
... this seems to say nothing important will happen?

In any case, having someone sign up to do the dracut integration seems like a very desirable way to resolve these things.
    Mirek