Re: [PATCH 0/2] Tristate moount option comatibility fixup

Theodore Y. Ts'o
2020-11-10T14:14:43Z

On Mon, Nov 09, 2020 at 08:10:07PM +0100, Michal Suchanek wrote:
> Hello,
>
> after the tristate dax option change some applications fail to detect
> pmem devices because the dax option no longer shows in mtab when device
> is mounted with -o dax.

Which applications? Name them.

We *really* don't want to encourage applications to make decisions
only based on the mount options. For example, it could be that the
application's files will have the S_DAX flag set.

It would be a real shame if we are actively encourage applications to
use a broken configuration mechanism which was only used as a hack
while DAX was in experimental status.

- Ted