On Thu, Mar 13, 2025 at 05:12:59PM +0000, John Garry wrote: > if (iter->flags & IOMAP_ATOMIC_HW) { > + /* > + * Ensure that the mapping covers the full write length, > + * otherwise we will submit multiple BIOs, which is > + * disallowed. > + */ "disallowed" doesn't really explain anything, why is it disallowed? Maybe: * Ensure that the mapping covers the full write length, * otherwise it can't be submitted as a single bio, * which is required to use hardware atomics.