From owner-freebsd-fs@FreeBSD.ORG  Mon May 20 20:58:47 2013
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Date: Mon, 20 May 2013 16:58:45 -0400 (EDT)
From: Rick Macklem <rmacklem@uoguelph.ca>
To: John Baldwin <jhb@freebsd.org>
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Subject: Re: kern/177335: [nfs] [panic] Sleeping on "vmopar" with the
 following non-sleepable locks held: exclusive sleep mutex NFSnode lock
 (NFSnode lock)
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Cc: freebsd-fs@freebsd.org, Rick Macklem <rmacklem@freebsd.org>,
 kib@freebsd.org, linimon@freebsd.org
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John Baldwin wrote:
> On Sunday, May 19, 2013 11:32:54 pm linimon@freebsd.org wrote:
> > Old Synopsis: Sleeping on "vmopar" with the following non-sleepable
> > locks
> held: exclusive sleep mutex NFSnode lock (NFSnode lock)
> > New Synopsis: [nfs] [panic] Sleeping on "vmopar" with the following
> > non-
> sleepable locks held: exclusive sleep mutex NFSnode lock (NFSnode
> lock)
> >
> > Responsible-Changed-From-To: freebsd-bugs->freebsd-fs
> > Responsible-Changed-By: linimon
> > Responsible-Changed-When: Mon May 20 03:32:02 UTC 2013
> > Responsible-Changed-Why:
> > Over to maintainer(s).
> 
> I think this issue might have been recently fixed in HEAD,
> specifically in
> r248567 and r248581.
> 
I just emailed the reporter with a variant of these patches for
8.3/old NFS client. I suppose I should change the PR status to
feedback.

And, yes, the panic appears to be the same as what the above
commits fix, except in 8.3/old NFS client.

rick

> --
> John Baldwin