On Thu, Apr 01, 2021 at 08:33:33AM -0700, Darrick J. Wong wrote: > On Mon, Mar 15, 2021 at 04:02:50PM +0100, 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> > > --- > > man/man5/xfs.5 | 18 ++++++++++++++++++ > > 1 file changed, 18 insertions(+) > > > > diff --git a/man/man5/xfs.5 b/man/man5/xfs.5 > > index 7642662f..46b0558a 100644 > > --- a/man/man5/xfs.5 > > +++ b/man/man5/xfs.5 > > @@ -133,6 +133,24 @@ 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 DAX behavior for the current filesystem. This mount option accepts the > > It might be worth defining what DAX (the acronym) is... > > "Set CPU direct access (DAX) behavior for regular files in the > filesystem." > > > +following values: > > + > > +"dax=inode" DAX will be enabled only on files with FS_XFLAG_DAX applied. > > "...enabled on regular files..." > > > + > > +"dax=never" DAX will be disabled by the whole filesystem including files with > > +FS_XFLAG_DAX applied" > > "DAX will not be enabled for any files. FS_XFLAG_DAX will be ignored." > > > + > > +"dax=always" DAX will be enabled to every file in the filesystem inclduing files > > "DAX will be enabled for all regular files, regardless of the > FS_XFLAG_DAX state." > > > +without FS_XFLAG_DAX applied" > > + > > +If no option is used when mounting a pmem device, dax=inode will be used as > > "If no option is used when mounting a filesystem stored on a device > capable of DAX access modes, dax=inode...." > > (DAX is a possibility with more than just persistent memory now...) > Thanks for the review Darrick. All the changes make sense to me, I'll apply them and send a V2. Cheers. -- Carlos
