Add sub-option support (sort-of) and convert libaio_userspace_reap
You should now use ioengine=libaio:userspace_reap instead of
the separate option.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/HOWTO b/HOWTO
index ad4e454..724b604 100644
--- a/HOWTO
+++ b/HOWTO
@@ -517,6 +517,16 @@
libaio Linux native asynchronous io. Note that Linux
may only support queued behaviour with
non-buffered IO (set direct=1 or buffered=0).
+ This engine also has a sub-option,
+ userspace_reap. To set it, use
+ ioengine=libaio:userspace_reap. Normally, with
+ the libaio engine in use, fio will use the
+ io_getevents system call to reap newly returned
+ events. With this flag turned on, the AIO ring
+ will be read directly from user-space to reap
+ events. The reaping mode is only enabled when
+ polling for a minimum of 0 events (eg when
+ iodepth_batch_complete=0).
posixaio glibc posix asynchronous io.
@@ -1187,13 +1197,6 @@
gid=int Set group ID, see uid.
-userspace_libaio_reap=bool Normally, with the libaio engine in use, fio
- will use the io_getevents system call to reap newly returned
- events. With this flag turned on, the AIO ring will be read
- directly from user-space to reap events. The reaping mode is
- only enabled when polling for a minimum of 0 events (eg when
- iodepth_batch_complete=0).
-
6.0 Interpreting the output
---------------------------