NFSv4 stuck

[Slawa Olhovchenkov]

On Wed, Jan 11, 2017 at 03:20:22PM -0800, Michael Sinatra wrote:

> On 01/11/17 14:59, Slawa Olhovchenkov wrote:
> > On Wed, Jan 11, 2017 at 10:39:42PM +0000, Rick Macklem wrote:
> >
> >> "umount -f" is your only chance. However, if there is already a non-forced
> >> dismount stuck, it won't work because the non-forced dismount will have
> >> the mounted-on vnode locked.
> >
> > I am use 'intr,soft' flags -- why ignored?
> 
> intr and soft are considered dangerous with nfsv4.  See the "BUGS" 
> section of the mount_nfs(8) man page.

Currently I am see dangerous w/o intr: system need reboot, application
don't killable.