Add specific knob for controlling fallocate() usage
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.1 b/fio.1
index dfca43e..60f787a 100644
--- a/fio.1
+++ b/fio.1
@@ -182,6 +182,11 @@
Seed the random number generator in a predictable way so results are repeatable
across runs. Default: true.
.TP
+.BI fallocate \fR=\fPbool
+By default, fio will use fallocate() to advise the system of the size of the
+file we are going to write. This can be turned off with fallocate=0. May not
+be available on all supported platforms.
+.TP
.BI fadvise_hint \fR=\fPbool
Disable use of \fIposix_fadvise\fR\|(2) to advise the kernel what I/O patterns
are likely to be issued. Default: true.