On Thu, Nov 04, 2021 at 06:34:31PM +0100, Christoph Hellwig wrote: > On Thu, Nov 04, 2021 at 10:32:35AM -0700, Darrick J. Wong wrote: > > I also wonder if it would be useful (since we're already having a > > discussion elsewhere about data integrity syscalls for pmem) to be able > > to call this sort of thing against files? In which case we'd want > > another preadv2 flag or something, and then plumb all that through the > > vfs/iomap as needed? > > IFF we do this (can't answer if there is a need) we should not > overload read with it. It is an operation that does not return > data but just a status, so let's not get into that mess. If there is a need for this, a new io_uring opcode seems like the appropirate user facing interface for it.
