[dm-devel] DM_snapshot_cow filesystem (dmsetup create snapshot)

[Douglas McClendon]

correction- "go read-write-rootfs' below should have been "go 
read-only-rootfs"

-dmc

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I admit that would indeed solve the present use case of keeping the 
overlay device functionally usable.  In fact, going with a brutal 
virtual-plug-pulling halt triggered by snapshot full would be fine. 
Though I'd rather at that instant have the system go read-write-rootfs 
so that I can still poke around somewhat, rather than the screen go black.