@@ -9,6 +9,7 @@ mkfs.btrfs \- create an btrfs filesystem
[ \fB \-l\fP\fI leafsize\fP ]
[ \fB \-L\fP\fI label\fP ]
[ \fB \-m\fP\fI metadata profile\fP ]
+[ \fB \-M\fP\fI mixed data+metadata\fP ]
[ \fB \-n\fP\fI nodesize\fP ]
[ \fB \-s\fP\fI sectorsize\fP ]
[ \fB \-h\fP ]
@@ -45,6 +46,12 @@ Specify a label for the filesystem.
Specify how metadata must be spanned across the devices specified. Valid
values are raid0, raid1, raid10 or single.
.TP
+\fB\-M\fR, \fB\-\-mixed\fR
+Mix data and metadata chunks together for more efficient space
+utilization. This feature incurs a performance penalty in
+larger filesystems. It is recommended for use with filesystems
+of 1 GiB or smaller.
+.TP
\fB\-n\fR, \fB\-\-nodesize \fIsize\fR
Specify the nodesize. By default the value is set to the pagesize.
.TP