X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=468772d7227a3a2c9a9cca50436e7c4bc4ebbf0b;hp=95289040dd3fd58a0bb70dfb0a94fadf1475e175;hb=3a294b8704a4125f12e3c3dec36667e68d821be0;hpb=843c6b5e081900394da002b45253e541b794ac54

diff --git a/HOWTO b/HOWTO
index 95289040..468772d7 100644
--- a/HOWTO
+++ b/HOWTO
@@ -2339,8 +2339,13 @@ I/O depth
 	``serialize_overlap`` tells fio to avoid provoking this behavior by explicitly
 	serializing in-flight I/Os that have a non-zero overlap. Note that setting
 	this option can reduce both performance and the :option:`iodepth` achieved.
-	Additionally this option does not work when :option:`io_submit_mode` is set to
-	offload. Default: false.
+
+	This option only applies to I/Os issued for a single job except when it is
+	enabled along with :option:`io_submit_mode`=offload. In offload mode, fio
+	will check for overlap among all I/Os submitted by offload jobs with :option:`serialize_overlap`
+	enabled.
+
+	Default: false.
 
 .. option:: io_submit_mode=str
 
@@ -2559,12 +2564,13 @@ I/O replay
 
 .. option:: replay_align=int
 
-	Force alignment of I/O offsets and lengths in a trace to this power of 2
-	value.
+	Force alignment of the byte offsets in a trace to this value. The value
+	must be a power of 2.
 
 .. option:: replay_scale=int
 
-	Scale sector offsets down by this factor when replaying traces.
+	Scale byte offsets down by this factor when replaying traces. Should most
+	likely use :option:`replay_align` as well.
 
 .. option:: replay_skip=str