[linux-lvm] Does LVM always do 'dm suspend' when lvcreating a thin snapshot?

[Mike McCracken]

 When creating a thin snapshot of a thin volume, does LVM always freeze the
FS?

I see when I run lvcreate with -vvv that it sends the 'dm suspend' message
to the origin lv, but on looking at the code I wasn't quite able to
convince myself that it will always do that, or under what circumstances it
won't.

Thanks,
-mike
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