On Wed, May 21, 2025 at 03:31:03PM -0700, Keith Busch wrote: > From: Keith Busch <kbusch@xxxxxxxxxx> > > Provide a basic block level api to copy a range of a block device's > sectors to a new destination on the same device. This just reads the > source data into host memory, then writes it back out to the device at > the requested destination. As someone who recently spent a lot of time on optimizing such loops: having a general API that allocates a buffer for each copy is a bad idea. You'll want some kind of caller provided longer living allocation if you do regularly do such copies. Maybe having common code is good to avoid copies, but I suspect most real users would want their own.
