On 2012-05-10, at 11:10 AM, Roland McGrath wrote: > POSIX specifies st_blksize thusly: "A file system-specific preferred > I/O block size for this object. In some file system types, this may > vary from file to file." > > Since there is only one available to POSIX applications, it should map > to the one that's described as "preferred IO size for general usage". Sure, but statxat() isn't a POSIX API. While I agree with the idea that there should be enough information about the underlying layout for applications to be able to submit good IO, it doesn't help if we have a bunch of extra fields that have vague meanings. They will get filled in by the filesystem in a haphazard way, and will not be used by application developers that don't understand what they mean. Cheers, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
