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Date: Sun, 18 Dec 2005 15:00:52 -0500
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: nfs@lists.sourceforge.net, linux-kernel@vger.kernel.org,
       ryan@tau.solarneutrino.net
Subject: Re: lockd: couldn't create RPC handle for (host)
Message-ID: <20051218200052.GA21665@tau.solarneutrino.net>
References: <20051216235841.GA20539@tau.solarneutrino.net> <1134797577.20929.2.camel@lade.trondhjem.org> <20051217055907.GC20539@tau.solarneutrino.net> <1134801822.7946.4.camel@lade.trondhjem.org> <20051217070222.GD20539@tau.solarneutrino.net> <1134847699.7950.25.camel@lade.trondhjem.org> <20051217194553.GE20539@tau.solarneutrino.net> <1134894836.7931.17.camel@lade.trondhjem.org> <20051218180150.GF20539@tau.solarneutrino.net> <1134934267.7966.37.camel@lade.trondhjem.org>
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From: Ryan Richter <ryan@tau.solarneutrino.net>
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On Sun, Dec 18, 2005 at 02:31:07PM -0500, Trond Myklebust wrote:
> On Sun, 2005-12-18 at 13:01 -0500, Ryan Richter wrote:
> > Code: 48 39 78 18 75 1c 8b 86 8c 00 00 00 a8 01 74 12 83 c8 02 89 
> > RIP <ffffffff801dbd9e>{nlmclnt_mark_reclaim+62} RSP <ffff81007dfade70>
> > CR2: 0000000000000018
> 
> Looks like the global lock list is corrupted. Could you cat the contents
> of /proc/locks?

$ cat /proc/locks
1: POSIX  ADVISORY  WRITE 1657 00:0e:1771273 0 EOF
2: FLOCK  ADVISORY  WRITE 1486 00:0e:1770759 0 EOF
3: FLOCK  ADVISORY  WRITE 1478 00:0e:1770399 0 EOF

> > Every machine with a dead lockd has had this oops.  Other stuff that
> > looks related (these came after the oops, a few days later):
> 
> Those errors are unrelated. These errors come from the server.
> 
> > lockd: unexpected unlock status: 1
> > lockd: weird return 7 for CANCEL call
> 
> Error "7" is the equivalent of "ESTALE" (stale filehandle). That means
> either someone deleted the file you are trying to lock on the server, or
> that a bug caused nfsd  to somehow lose track of the file.
> 
> I suspect the Error "1" is related to the same issue.

Unfortunately I don't have a date stamp for these messages.  I think
they might be from my initial efforts to debug the problem - I deleted
some lock files once or twice.  None of the other machines had these
messages.

> 
> > > Finally, please do
> > > 
> > > echo 1 > /proc/sys/sunrpc/rpc_lockd
> > > then unmount one of your NFS partitions, and then mount it again.
> > 
> > That file doesn't exist.
> > 
> > $ ls /proc/sys/sunrpc 
> > nfs_debug  nfsd_debug  nlm_debug  rpc_debug  tcp_slot_table_entries
> > udp_slot_table_entries
> 
> Sorry, I meant 'nlm_debug'.

OK, I did that and unmounted and remounted the home directories.
There's still no lockd process.  I had someone using kde log in, and the
login hung for a couple of minutes but then proceeded - it didn't do
that before.  There were no kernel messages.

-ryan
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