On Wed, Jan 29, 2025 at 04:40:25PM +0100, Christoph Hellwig wrote: > > > > 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. > > If the device generates the checksum (aka DIF insert) that problem goes > away. But we also lose integrity protection over the wire, which would > be unfortunate. If the "wire" is only PCIe, I don't see why it matters. What kind of wire corruption gets undetected by the protocol's encoding and LCRC that would get caught by the host's CRC payload?
