On 2015-10-14 14:53, Andy Lutomirski wrote:
I would argue that it should have such functionality, but not do so by default (maybe add some option to tell it to ask the FS to accelerate the copy operation?).On Wed, Oct 14, 2015 at 11:49 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:On Wed, Oct 14, 2015 at 11:38:13AM -0700, Andy Lutomirski wrote:One might argue that reflink is like copy + immediate dedupe.Not, it's not. It's all that and more, because it is an operation that is atomic vs other writes to the file and it's an operation that either clones the whole range or nothing. That's a very important difference.Fair enough. Would copy_file_range without the reflink option removed still be permitted to link blocks on supported filesystems (btrfs and maybe XFS)?
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