configure: remove libaio-uring remnant

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 74509bbd2ea434278a6970c14e71e965cc083cd0..481193254832befdd285394d6424c209b8805989 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -1462,9 +1462,31 @@ starting I/O if the platform and file type support it. Defaults to true.
 This will be ignored if \fBpre_read\fR is also specified for the
 same job.
 .TP
 This will be ignored if \fBpre_read\fR is also specified for the
 same job.
 .TP

-.BI sync \fR=\fPbool
-Use synchronous I/O for buffered writes. For the majority of I/O engines,
-this means using O_SYNC. Default: false.
+.BI sync \fR=\fPstr
+Whether, and what type, of synchronous I/O to use for writes.  The allowed
+values are:
+.RS
+.RS
+.TP
+.B none
+Do not use synchronous IO, the default.
+.TP
+.B 0
+Same as \fBnone\fR.
+.TP
+.B sync
+Use synchronous file IO. For the majority of I/O engines,
+this means using O_SYNC.
+.TP
+.B 1
+Same as \fBsync\fR.
+.TP
+.B dsync
+Use synchronous data IO. For the majority of I/O engines,
+this means using O_DSYNC.
+.PD
+.RE
+.RE

 .TP
 .BI iomem \fR=\fPstr "\fR,\fP mem" \fR=\fPstr
 Fio can use various types of memory as the I/O unit buffer. The allowed
 .TP
 .BI iomem \fR=\fPstr "\fR,\fP mem" \fR=\fPstr
 Fio can use various types of memory as the I/O unit buffer. The allowed


@@ -2215,7 +2237,7 @@ 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
 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
 .SS "I/O rate"
 .TP
 .BI thinktime \fR=\fPtime