X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.1;h=ed492682fde0a1a3a9f3498a80a46959879454b8;hp=5c11d963d93dc02d0bf5fd34a3ac6dd633784acb;hb=c21198d9cd52b6239c8f9de2373574a7683a0593;hpb=843c6b5e081900394da002b45253e541b794ac54

diff --git a/fio.1 b/fio.1
index 5c11d963..ed492682 100644
--- a/fio.1
+++ b/fio.1
@@ -2070,8 +2070,15 @@ changing data and the overlapping region has a non-zero size. Setting
 \fBserialize_overlap\fR 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 \fBiodepth\fR achieved.
-Additionally this option does not work when \fBio_submit_mode\fR is set to
-offload. Default: false.
+.RS
+.P
+This option only applies to I/Os issued for a single job except when it is
+enabled along with \fBio_submit_mode\fR=offload. In offload mode, fio
+will check for overlap among all I/Os submitted by offload jobs with \fBserialize_overlap\fR
+enabled.
+.P
+Default: false.
+.RE
 .TP
 .BI io_submit_mode \fR=\fPstr
 This option controls how fio submits the I/O to the I/O engine. The default
@@ -2257,11 +2264,12 @@ Unfortunately this also breaks the strict time ordering between multiple
 device accesses.
 .TP
 .BI replay_align \fR=\fPint
-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.
 .TP
 .BI replay_scale \fR=\fPint
-Scale sector offsets down by this factor when replaying traces.
+Scale bye offsets down by this factor when replaying traces. Should most
+likely use \fBreplay_align\fR as well.
 .SS "Threads, processes and job synchronization"
 .TP
 .BI replay_skip \fR=\fPstr