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Date: Thu, 09 Apr 2009 09:38:58 -0400
From: Jacques Manukyan <mlfreebsd@streamingedge.com>
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Subject: Re: cannot kill process with kill -9
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Eray Aslan wrote:
> On Thu, Apr 09, 2009 at 09:41:31AM +0200, Pieter Donche wrote:
>   
>> I have a mount_nfs process that refuses to get killed :
>> # ps -jaxw | grep mount
>> root   60342     1 60289 60289    0 D     ??    0:00.00 mount_nfs 
>>     
> [...] 
>   
>> How to I get this process killed?
>>     
>
> reboot.  You can't kill a process with a D flag.  Google for
> uninterruptible sleep

There is a rare exception that doesn't always work. But you can find 
processes that have locked onto that mount point and kill those. Then 
try unmounting or killing that NFS mount.

Get lsof in /usr/ports/sysutils/lsof and see what's keeping that mount 
point open. Then kill those processes.

But again, this may not work. The only way to release processes marked 
with a D flag is to reboot.

-- Jacques Manukyan