Re: Supporting reflinked/cow files in coreutils

[Jim Meyering]

Jeff liu wrote:
> Hi Philipp,
>
> Thanks for taking a look at this feature, and sorry for my late response!
>
> Hi Jim,
>
> Recently, I have discussed with a colleague(Bo Liu CC-ed) who is focus
> on Btrfs development, and we
> decided to teach Btrfs aware of reflinked extents per file for du(1) purpose. 
> :)

Hi Jeff,

When do you expect that support to be in upstream kernels?

...
>> If you and/or Jeff are motivated enough, a good first step would be to
>> post a rebased patch to bug-coreutils, preferably after you've switched
>> out that rbtree.[ch] for gnulib's code.  I hesitate even to suggest
>> that you rebase, because we might end up deciding it's not yet worth
>> the cost, but let's hear what others have to say.  Maybe enough people
>> use du and are bothered because the space used by their reflinked files
>> is over-reported.
>
> We can find time to rebase it according to your suggestions if you like.

Depending on when btrfs support is expected, you may want to wait.
I would want to be able to test against both file system types.