fio: add libiscsi engine

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index bf181b345548414865d7d138ba38c372b1619941..2708b503eea79b8abedd1d2972a230152612e2b8 100644 (file)
--- 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