On Fri, 2020-11-06 at 12:50 -0400, George N. White III wrote:
> > # chattr +C swapfile
> > chattr: Invalid argument while setting flags on swapfile
> > 
> 
> Mybe we are no lnpger meant to use chattr: Manual page btrfs-
> property(8)
> says:
> 
> "btrfs property provides an unified and user-friendly method to tune
> different btrfs
> properties instead of using the traditional method like chattr(1) or
> lsattr(1)."

I had already looked at btrfs-property when originally trying to set
this up. Unfortunately it doesn't have options relating to COW (or if
it does they aren't documented). Seems strange to me, but there it is.
I don't know of any other way to do this apart from chattr.

poc
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