Re: [PATCH v7 3/6] libnvdimm: add dax_dev sync flag
From: Pankaj Gupta
Date: Thu May 09 2019 - 08:25:37 EST
> > This patch adds 'DAXDEV_SYNC' flag which is set
> > for nd_region doing synchronous flush. This later
> > is used to disable MAP_SYNC functionality for
> > ext4 & xfs filesystem for devices don't support
> > synchronous flush.
> > Signed-off-by: Pankaj Gupta <pagupta@xxxxxxxxxx>
> > diff --git a/include/linux/dax.h b/include/linux/dax.h
> > index 0dd316a74a29..c97fc0cc7167 100644
> > --- a/include/linux/dax.h
> > +++ b/include/linux/dax.h
> > @@ -7,6 +7,9 @@
> > #include <linux/radix-tree.h>
> > #include <asm/pgtable.h>
> > +/* Flag for synchronous flush */
> > +#define DAXDEV_F_SYNC true
> I'd feel better, i.e. it reads more canonically, if this was defined
> as (1UL << 0) and the argument to alloc_dax() was changed to 'unsigned
> long flags' rather than a bool.
Sure, Will send a v8 with suggested changes.