Re: Copy on write hard links?

[Pádraig Brady]

On 09/25/2013 03:37 PM, richard -rw- weinberger wrote:
> On Wed, Sep 25, 2013 at 4:28 PM, Thomas Meyer <thomas@xxxxxxxx> wrote:
>> Am Mittwoch, den 25.09.2013, 08:59 -0500 schrieb Rob Landley:
>>> On 09/24/2013 01:36:56 PM, Thomas Meyer wrote:
>>>> Hi,
>>>>
>>>> Is there such a thing?
>>>
>>> In the kernel's vfs layer?
>>
>> Yes, that would be a nice feature!
> 
> You mean reflinks?
> Currently only OCFS2 and btrfs support them.
> Both using a fs specific ioctl().
> IIRC GNU cp uses the btrfs specific one if the --reflink parameter is used.

coreutils is waiting for a reflink syscall to materialize
rather than adding new per filesystem support
http://lwn.net/Articles/335380/

thanks,
Pádraig.
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