K 10
svn:author
V 7
asomers
K 8
svn:date
V 27
2020-09-10T02:48:55.415253Z
K 7
svn:log
V 395
cp: use copy_file_range(2)

This has three advantages over write(2)/read(2):

* Fewer context switches and data copies
* Mostly preserves a file's sparseness
* On some file systems (currently NFS 4.2) the file system will perform the
  copy in an especially efficient way.

Reviewed by:	rmacklem
MFC after:	2 weeks
Sponsored by:	Axcient
Differential Revision:	https://reviews.freebsd.org/D26377

END