Re: [PATCH Version-2 03/12] VFS permit cross device vfs_copy_file_range

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On Sat, Aug 20, 2016 at 08:18:33AM +0200, Christoph Hellwig wrote:
> On Fri, Aug 19, 2016 at 05:08:44PM -0400, J. Bruce Fields wrote:
> > I thought I remembered Christoph (cc'd) arguing at the 2015 lsf/mm that
> > there were some more issues that would need to be taken care of before
> > we could turn on cross-device copies.
> 
> Yes.  Noi other VFS operation is supported between mountpoint, so
> copy_file_range shouldn't be either.

Is there anything specific it would break?

> Also a general NAK to any new copy_file_range work before we have
> proper xfstests coverage.  And it's not like the coverage is hard,
> we already have 100s of tests for clone, which in many way is very
> similar and could be partially reused.

Sounds like a reasonable request.

--b.
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