Re: [PATCH 0/2] btrfs: allow cross-subvolume BTRFS_IOC_CLONE

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On Mon, Jan 9, 2012 at 1:58 AM, Marios Titas <redneb8888@xxxxxxxxx> wrote:
>> The simple case of 'cp --reflink' works fine [...]
>
> It doesn't work here:
>
> cp: failed to clone `/tmp/test': Invalid cross-device link
>
> That's with 3.1 + for-linus.

This is the problem, it doesn't work because you have to apply the
patch at http://permalink.gmane.org/gmane.comp.file-systems.btrfs/9865
which is not mainlined yet. This patch dates back from March 31st, I
have been using it since it was released.
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