On Wed, Jun 19, 2019 at 05:04:39PM +0300, Nikolay Borisov wrote:
> Commit ba23855cdc89 ("btrfs-progs: send: use splice syscall instead of
> read/write to transfer buffer") changed the send implementation to use
> splice(). The old read/write implementation hasn't be used for at least
> 3 years, it's time to remove it.I left it there in case there are problems with splice so we could potentially offer option for the copy mechanism, but time proved it's not necessary.
