[0/1] xfs: faster unaligned copy_file_range

Message

Darrick J. Wong Dec. 1, 2020, 3:37 a.m. UTC

Hi all,

Here's a quick patch to speed up copy_file_range on unaligned ranges by
using reflink when possible to reduce the amount of pagecache copying.

If you're going to start using this mess, you probably ought to just
pull from my git trees, which are linked below.

This is an extraordinary way to destroy everything.  Enjoy!
Comments and questions are, as always, welcome.

--D

kernel git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=copy-range-faster-5.11
---
 fs/xfs/xfs_file.c |   99 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)