On Mon, May 20, 2024 at 03:50:13PM +0530, Nitesh Shetty wrote: > So copy offload works only for request based storage drivers. I don't think that is actually true. It just requires a fair amount of code in a bio based driver to match the bios up. I'm missing any kind of information on what this patch set as-is actually helps with. What operations are sped up, for what operations does it reduce resource usage? Part of that might be that the included use case of offloading copy_file_range doesn't seem particularly useful - on any advance file system that would be done using reflinks anyway. Have you considered hooking into dm-kcopyd which would be an instant win instead? Or into garbage collection in zoned or other log structured file systems? Those would probably really like multiple source bios, though.
