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Date: Thu, 14 Apr 2016 15:08:22 -0400 (EDT)
From: Benjamin Coddington <bcodding@redhat.com>
To: Ziemowit PIerzycki <ziemowit@pierzycki.com>
cc: linux-nfs@vger.kernel.org
Subject: Re: What is a 10.10.10.20-man process?
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On Thu, 14 Apr 2016, Ziemowit PIerzycki wrote:

> I have a strange issue when NFS4 mounts to a Netapp filer freeze on my Linux
> KVMs.  Looking over few things I noticed a process "10.10.10.20-man" is in D
> state but I can't find anything information about it.  Mainly because
> 10.10.10.20 is the IP of the filer and searching for "-man" is too generic.
>
> Why would this process be frozen?

This is the nfs4 state manager process.  What's in the file:
/proc/<pid of that process>/stack

Ben