Update iodepth_batch documentation
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index ca095a3..a20f714 100644
--- a/HOWTO
+++ b/HOWTO
@@ -402,8 +402,9 @@
concurrency.
iodepth_batch=int This defines how many pieces of IO to submit at once.
- It defaults to the same as iodepth, but can be set lower
- if one so desires.
+ It defaults to 1 which means that we submit each IO
+ as soon as it is available, but can be raised to submit
+ bigger batches of IO at the time.
iodepth_low=int The low water mark indicating when to start filling
the queue again. Defaults to the same as iodepth, meaning