Re: [PATCH] xfs/XXX: Add xfs/XXX

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

On 2020/4/14 0:30, Darrick J. Wong wrote:
> This might be a good time to introduce a few new helpers:
>
> _require_scratch_dax ("Does $SCRATCH_DEV support DAX?")
> _require_scratch_dax_mountopt ("Does the fs support the DAX mount options?")
> _require_scratch_daX_iflag ("Does the fs support FS_XFLAG_DAX?")
Hi Darrick,

Now, I am trying to introduce these new helpers and have some questions:
1) There are five testcases related to old dax implementation, should we 
only convert them to new dax implementation or make them compatible with 
old and new dax implementation?

2) I think _require_xfs_io_command "chattr" "x" is enough to check if fs 
supports FS_XFLAG_DAX.  Is it necessary to add 
_require_scratch_dax_iflag()? like this:
_require_scratch_dax_iflag()
{
	_require_xfs_io_command "chattr" "x"
}

Best Regards,
Xiao Yang