[Question] about async buffered reads feature

[Hao_Xu <haoxu@xxxxxxxxxxxxxxxxx>]

Hi Jens,
I'm doing tests about this feature: [PATCHSET RFC 0/11] Add support for 
async buffered reads
But currently with fio testing, I found the code doesn't go to the 
essential places in the function generic_file_buffered_read:

          if (iocb->ki_flags & IOCB_WAITQ) {
                  if (written) {
                          put_page(page);
                          goto out;
                  }
                  error = wait_on_page_locked_async(page,
                                                  iocb->ki_waitq);
          } else {

and

  page_not_up_to_date:
         /* Get exclusive access to the page ... */
         if (iocb->ki_flags & IOCB_WAITQ)
                 error = lock_page_async(page, iocb->ki_waitq);
         else


could you give me a copy of your test program which you mentioned in the 
RFC?
My testing environment:
fio version: 3.10
kernel version: the mainline kernel, latest commit is 
805c6d3c19210c90c109107d189744e960eae025


Thanks,
Hao