Re: Upcoming: Notifications, FS notifications and fsinfo()

[Miklos Szeredi]

On Thu, Apr 2, 2020 at 5:23 PM David Howells <dhowells@xxxxxxxxxx> wrote:
>
> Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
>
> > > > Not sure what you mean.  I think it shows precisely the information
> > > > Karel asked for.
> > >
> > > It's not atomic.
> >
> > Yes it is.
>
> No, it really isn't - though it could be made so.
>
> ext4_show_mount(), for example, doesn't lock against "mount -o remount", so
> the configuration can be changing whilst it's being rendered to text.

Does s_umount nest inside namespace_sem?  I really don't see the
relation of those locks.

Thanks,
Miklos