engines/libaio: only initialize iocb members when we need to

[fio.git] / engines / libaio.c

diff --git a/engines/libaio.c b/engines/libaio.c
index d386d144fe84448d4541c2340e7cb670cb28847a..9c8a61b7a121e411bf0e6bcc585491fc49789a39 100644 (file)
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -125,16 +125,20 @@ static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
        else
                iocb = &io_u->iocb;
 
-       iocb->u.c.flags = 0;
-
        if (io_u->ddir == DDIR_READ) {
-               io_prep_pread(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
-               if (o->hipri)
-                       iocb->u.c.flags |= IOCB_FLAG_HIPRI;
+               if (o->fixedbufs) {
+                       iocb->aio_fildes = f->fd;
+                       iocb->aio_lio_opcode = IO_CMD_PREAD;
+                       iocb->u.c.offset = io_u->offset;
+               } else
+                       io_prep_pread(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
        } else if (io_u->ddir == DDIR_WRITE) {
-               io_prep_pwrite(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
-               if (o->hipri)
-                       iocb->u.c.flags |= IOCB_FLAG_HIPRI;
+               if (o->fixedbufs) {
+                       iocb->aio_fildes = f->fd;
+                       iocb->aio_lio_opcode = IO_CMD_PWRITE;
+                       iocb->u.c.offset = io_u->offset;
+               } else
+                       io_prep_pwrite(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
        } else if (ddir_sync(io_u->ddir))
                io_prep_fsync(iocb, f->fd);
 
@@ -468,6 +472,10 @@ static int fio_libaio_post_init(struct thread_data *td)
                        iocb = &ld->user_iocbs[i];
                        iocb->u.c.buf = io_u->buf;
                        iocb->u.c.nbytes = td_max_bs(td);
+
+                       iocb->u.c.flags = 0;
+                       if (o->hipri)
+                               iocb->u.c.flags |= IOCB_FLAG_HIPRI;
                }
        }