Sleeping thread owns a nonsleepable lock panic (& lor)

[Kostik Belousov]

On Tue, Jul 26, 2011 at 01:17:52PM +0200, Herve Boulouis wrote:
> Le 26/07/2011  12:06, Kostik Belousov a Иcrit:
> > On Tue, Jul 26, 2011 at 11:49:13AM +0200, Herve Boulouis wrote:
> > > Le 25/07/2011  11:59, Kostik Belousov a ?crit:
> > > 
> > > Ok the patched server crashed this morning strangely : all httpd processes were stuck in nfs or vmopar
> > > and were unkillable. Below is the full ps.
> > 
> > Please see the
> > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html
> > for information required to debug the deadlocks.
> 
> the box was not stricly deadlocked since I was able to interact with it but I suppose you want me to
> break into debugger when the symptoms appears again and report all the commands listed in the handbook
> deadlock section ?

Exactly.

I think everything was hung that accessed an nfs mount point.
From the usermode, procstat -kk could catch some interesting information,
but it is redundant if ddb output is captured.
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