Disable io_submit_mode=offload with async engines

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 74509bbd2ea434278a6970c14e71e965cc083cd0..a881277c80279873f16414ce7a257fa5ab881bbd 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -2215,7 +2215,7 @@ has a bit of extra overhead, especially for lower queue depth I/O where it
 can increase latencies. The benefit is that fio can manage submission rates
 independently of the device completion rates. This avoids skewed latency
 reporting if I/O gets backed up on the device side (the coordinated omission
-problem).
+problem). Note that this option cannot reliably be used with async IO engines.
 .SS "I/O rate"
 .TP
 .BI thinktime \fR=\fPtime