path: root/man
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authorMitch Harder <>2010-11-15 16:32:12 +0000
committerChris Mason <>2011-10-25 09:18:31 -0400
commit25095966bd07547cca532128d5ca80a37be13475 (patch)
treece3d21518bcc468fb4845ceb47f0703b99081fde /man
parente8f47cf068c3a4b5de7770ebb9eef37e28e09ef7 (diff)
Btrfs-progs: Update man page for mixed data+metadata option.
Update the mkfs.btrfs man page for the -M option to mix data and metadata chunks. Signed-off-by: Chris Mason <>
Diffstat (limited to 'man')
1 files changed, 7 insertions, 0 deletions
diff --git a/man/ b/man/
index 1e14c6c0..432db1b2 100644
--- a/man/
+++ b/man/
@@ -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.
+\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.
\fB\-n\fR, \fB\-\-nodesize \fIsize\fR
Specify the nodesize. By default the value is set to the pagesize.