Async verify HOWTO/man update
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index 55662d3..5099c83 100644
--- a/HOWTO
+++ b/HOWTO
@@ -832,7 +832,10 @@
thread. This option takes an integer describing how many
async offload threads to create for IO verification instead,
causing fio to offload the duty of verifying IO contents
- to one or more separate threads.
+ to one or more separate threads. If using this offload
+ option, even sync IO engines can benefit from using an
+ iodepth setting higher than 1, as it allows them to have
+ IO in flight while verifies are running.
verify_async_cpus=str Tell fio to set the given CPU affinity on the
async IO verification threads. See cpus_allowed for the