Fio currently tells you:
"fio: first direct IO errored. File system may not support direct IO, or
iomem_align= is bad."
but it doesn't offer a remedy. Add a suggestion to set direct=0 if this
happens. It can happen because of a badly configured job, or from
blktrace replay because the latter adds direct=1 automatically. But that
may fail, if the trace contains IO that isn't sector aligned.
Signed-off-by: Jens Axboe <axboe@fb.com>