Add note saying that HP-UX should work

[fio.git] / engines / posixaio.c

diff --git a/engines/posixaio.c b/engines/posixaio.c
index f27ad8ce0a3230d128ad1d555d415c1727d4116d..a84eb773f5a883356f5ea1891bf81da1e7749187 100644 (file)
--- a/engines/posixaio.c
+++ b/engines/posixaio.c
@@ -152,7 +152,7 @@ static struct io_u *fio_posixaio_event(struct thread_data *td, int event)
        return pd->aio_events[event];
 }
 
-static int fio_posixaio_queue(struct thread_data fio_unused *td,
+static int fio_posixaio_queue(struct thread_data *td,
                              struct io_u *io_u)
 {
        struct posixaio_data *pd = td->io_ops->data;
@@ -184,6 +184,15 @@ static int fio_posixaio_queue(struct thread_data fio_unused *td,
        }
                
        if (ret) {
+               /*
+                * At least OSX has a very low limit on the number of pending
+                * IOs, so if it returns EAGAIN, we are out of resources
+                * to queue more. Just return FIO_Q_BUSY to naturally
+                * drop off at this depth.
+                */
+               if (errno == EAGAIN)
+                       return FIO_Q_BUSY;
+
                io_u->error = errno;
                td_verror(td, io_u->error, "xfer");
                return FIO_Q_COMPLETED;