On Wed, May 13, 2015 at 02:25:15PM +1000, NeilBrown wrote:
> On Mon, 11 May 2015 21:08:47 +0800 Kinglong Mee <kinglongmee@xxxxxxxxx> wrote:
>
> > On 5/8/2015 9:47 PM, J. Bruce Fields wrote:
> > > It could also be useful to have the ability to force an unmount even in
> > > the presence of locks. That's not a safe default, but an
> > > "allow_force_unmount" export option might be useful.
>
> We already have a mechanism to forcibly drop any locks by writing some magic
> to /proc/fs/nfsd/unlock_{ip,filesystem}. I don't think we need any more.
Yeah, I remember thinking this sort of approach would have advantages,
maybe I was wrong, I need to revisit it.
The unlock_{ip,filesystem} approach requires temporarily shutting down
mountd, doesn't it?
--b.
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