On Mon, Oct 29, 2018 at 01:40:49PM -0400, Olga Kornievskaia wrote: > From: Olga Kornievskaia <kolga@xxxxxxxxxx> > > If a filesystem does not support cross device or cross file system > type copy offload functionality, then this patch provides a fallback > to a page cache based physical data copy. This means the > copy_file_range() systemcall will never fail with EXDEV, and so in > future userspace will not need to detect or provide a fallback for > failed cross-device copies anymore. > > Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx> Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
