Killing process in D state on mount to dead NFS server.

[Ben Greear <greearb@candelatech.com>]

So, this has been asked all over the interweb for years and years, but
the best answer I can find is to reboot the system or create a fake NFS
server somewhere with the same IP as the gone-away NFS server.

The problem is:

I have some mounts to an NFS server that no longer exists (crashed/powered down).

I have some processes stuck trying to write to files open on these mounts.

I want to kill the process and unmount.

umount -l will make the mount go a way, sort of.  But process is still hung.
umount -f complains:
  umount2:  Device or resource busy
  umount.nfs: /mnt/foo: device is busy

kill -9 does not work on process.


Aside from bringing a fake NFS server back up on the same IP, is there any
other way to get these mounts unmounted and the processes killed without
rebooting?

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com