On Wed, Jan 29, 2025 at 07:32:04PM +0530, Kanchan Joshi wrote: > There is value in avoiding Copy-on-write (COW) checksum tree on > a device that can anyway store checksums inline (as part of PI). > This would eliminate extra checksum writes/reads, making I/O > more CPU-efficient. Another potential benefit: if the device does the checksum, then I think btrfs could avoid the stable page writeback overhead and let the contents be changable all the way until it goes out on the wire. Though I feel the very specific device format constraints that can support an offload like this are a unfortunate.
