Now that we have the tristate dax mount options, it is possible to enable DAX mode for non-reflinked files on a reflink-capable filesystem. Clarify this in the mkfs.xfs manpage. Reported-by: Bill O'Donnell <bodonnel@xxxxxxxxxx> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> --- diff --git a/man/man8/mkfs.xfs.8 b/man/man8/mkfs.xfs.8 index a7f70285..84ac50e8 100644 --- a/man/man8/mkfs.xfs.8 +++ b/man/man8/mkfs.xfs.8 @@ -316,12 +316,20 @@ option set. When the option is used, the reference count btree feature is not supported and reflink is disabled. .IP -Note: the filesystem DAX mount option ( +Note: the filesystem-wide DAX mount options ( .B \-o dax -) is incompatible with -reflink-enabled XFS filesystems. To use filesystem DAX with XFS, specify the +and +.B \-o dax=always +) are incompatible with +reflink-enabled XFS filesystems. To use filesystem-wide DAX with XFS, specify the .B \-m reflink=0 option to mkfs.xfs to disable the reflink feature. +Alternatey, use the +.B \-o dax=inode +mount option to selectively enable DAX mode on non-reflinked files. +See +.BR xfs (5) +for more information. .RE .PP .PD 0
