X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.1;h=2708b503eea79b8abedd1d2972a230152612e2b8;hp=5c11d963d93dc02d0bf5fd34a3ac6dd633784acb;hb=247ef2aaf28a;hpb=843c6b5e081900394da002b45253e541b794ac54

diff --git a/fio.1 b/fio.1
index 5c11d963..2708b503 100644
--- a/fio.1
+++ b/fio.1
@@ -1751,6 +1751,9 @@ are "contiguous" and the IO depth is not exceeded) before issuing a call to IME.
 Asynchronous read and write using DDN's Infinite Memory Engine (IME). This
 engine will try to stack as much IOs as possible by creating requests for IME.
 FIO will then decide when to commit these requests.
+.TP
+.B libiscsi
+Read and write iscsi lun with libiscsi.
 .SS "I/O engine specific parameters"
 In addition, there are some parameters which are only valid when a specific
 \fBioengine\fR is in use. These are used identically to normal parameters,
@@ -2070,8 +2073,15 @@ 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 +2267,12 @@ 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