> + xfs_mount_t *mp, Please use the struct type here. > + /* > + * Write new AG headers to disk. Non-transactional, but need to be > + * written and completed prior to the growfs transaction being logged. > + * To do this, we use a delayed write buffer list and wait for > + * submission and IO completion of the list as a whole. This allows the > + * IO subsystem to merge all the AG headers in a single AG into a single > + * IO and hide most of the latency of the IO from us. > + * > + * This also means that if we get an error whilst building the buffer > + * list to write, we can cancel the entire list without having written > + * anything. > + */ Maybe move the comment on top of the whole function, as it really explains what the function does.
