NVMe "Simple Copy" Offloaded Copy Support Being Prepared For The Linux Kernel

[KJ7LNW]

phoronix, this topic has been gaining traction lately: There is a v17 patchset for "Implement copy offload support" that was released just last month:

• https://lore.kernel.org/all/[email protected]/
• https://patchwork.kernel.org/[email protected]/

This would be a great Linux kernel feature, and it would be great to see some more attention on the subject. Once copy offload is added, there will be many optimization opportunities in filesystems for any CoW operation (eg, BTRFS, bcachefs, dm-thin) and in the block layer (eg, dm-kcopyd, dm-integrity journal copy-out), and of course anywhere a journal replay as applied.

-Eric