Re: Odd BTRFS COW behaviour

[James Hogarth]

On 17 January 2014 13:38, Chris Murphy <lists(a)colorremedies.com&gt; wrote:

>  On Jan 17, 2014, at 6:06 AM, James Hogarth <james.hogarth(a)gmail.com&gt;
>  wrote:
>
>
>  So far as I understand it when in the same pool cross-subvolume COW should
>  be valid (as shown in /data on the server) - even if technically under
>  separate mounts.
>
>
>  I haven't yet found anything newer than this:
>
>
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id...
>
>  The clone can be in different subvolumes but the source and destination
>  must be the same mount point.
>
>  There's a similar effect with btrfs send that might be related, and it has
>  patches upstream.
>
>  http://www.spinics.net/lists/linux-btrfs/msg30852.html
>
>
>  
Thanks that commit does indeed match my behaviour ... even if it seems a
bit messed up all things considered ...

I might use a Fedora Live instance and remove the /home mount point whilst
maintaining as a subvolume within root ...

In fact given this behaviour I'm thinking that a bug against anaconda might
be warranted to  make home a subvolume (for easy snapshotting etc) but to
not explicitly mount it to get the maximum flexibility...

James