On Tue, Apr 06, 2021 at 01:56:12PM +0200, Carlos Maiolino wrote: > Details are already in kernel's documentation, but make dax mount option > information accessible through xfs(5) manpage. > > Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx> Yay! Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --D > --- > > Changelog: > V2: > - Add changes suggested by Darrick on his review. > > man/man5/xfs.5 | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/man/man5/xfs.5 b/man/man5/xfs.5 > index 7642662f..372dc08a 100644 > --- a/man/man5/xfs.5 > +++ b/man/man5/xfs.5 > @@ -133,6 +133,23 @@ by the filesystem. > CRC enabled filesystems always use the attr2 format, and so > will reject the noattr2 mount option if it is set. > .TP > +.BR dax=value > +Set CPU direct access (DAX) behavior for the current filesystem. This mount > +option accepts the following values: > + > +"dax=inode" DAX will be enabled only on regular files with FS_XFLAG_DAX applied. > + > +"dax=never" DAX will not be enabled for any files. FS_XFLAG_DAX will be ignored. > + > +"dax=always" DAX will be enabled for all regular files, regardless of the > +FS_XFLAG_DAX state. > + > +If no option is used when mounting a filesystem stored on a DAX capable device, > +dax=inode will be used as default. > + > +For details regarding DAX behavior in kernel, please refer to kernel's > +documentation at filesystems/dax.txt > +.TP > .BR discard | nodiscard > Enable/disable the issuing of commands to let the block > device reclaim space freed by the filesystem. This is > -- > 2.30.2 >
