linux-kernel - Re: NFSv4 poops itself

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Message-Id: <1185547550.6586.24.camel@localhost>
Date:	Fri, 27 Jul 2007 10:45:50 -0400
From:	Trond Myklebust <Trond.Myklebust@...app.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Marc Dietrich <Marc.Dietrich@...physik.uni-giessen.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: NFSv4 poops itself

On Fri, 2007-07-27 at 09:40 -0400, Jeff Garzik wrote:
> (please don't drop CC's when you reply to email; you are cutting 
> relevant people out of the loop)
> 
> 
> Marc Dietrich wrote:
> > me too, my server has 2.6.18-? (openSUSE 10.2). On the client 
> > (2.6.23-rc1-mm1), I also see (shortly before the hang)
> > 
> > Jul 26 13:09:19 fb07-iapwap2 kernel: =================================
> > Jul 26 13:09:19 fb07-iapwap2 kernel: [ INFO: inconsistent lock state ]
> > Jul 26 13:09:19 fb07-iapwap2 kernel: 2.6.23-rc1-mm1 #1
> > Jul 26 13:09:19 fb07-iapwap2 kernel: ---------------------------------
> > Jul 26 13:09:19 fb07-iapwap2 kernel: inconsistent {softirq-on-W} -> 
> > {in-softirq-W} usage.
> > Jul 26 13:09:19 fb07-iapwap2 kernel: hald/3873 [HC0[0]:SC1[1]:HE1:SE0] takes:
> > Jul 26 13:09:19 fb07-iapwap2 kernel:  (rpc_credcache_lock){-+..}, at: 
> > [<c01dc166>] _atomic_dec_and_lock+0x16/0x60
> > Jul 26 13:09:19 fb07-iapwap2 kernel: {softirq-on-W} state was registered at:
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c013d4f7>] mark_lock+0x77/0x630
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c013c094>] add_lock_to_list+0x44/0xc0
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c013e8af>] 
> > __lock_acquire+0x65f/0x1020
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c013db0e>] mark_held_locks+0x5e/0x80
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c012448d>] local_bh_enable+0x7d/0x130
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c013f2cf>] lock_acquire+0x5f/0x80
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c01dc166>] 
> > _atomic_dec_and_lock+0x16/0x60
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c02d156a>] _spin_lock+0x2a/0x40
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c01dc166>] 
> > _atomic_dec_and_lock+0x16/0x60
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c01dc166>] 
> > _atomic_dec_and_lock+0x16/0x60
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<c02d156a>] _spin_lock+0x2a/0x40
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dcecf770>] put_rpccred+0x60/0x110 
> > [sunrpc]
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dcecf840>] 
> > rpcauth_unbindcred+0x20/0x60 [sunrpc]
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dcece1f4>] rpc_put_task+0x44/0xb0 
> > [sunrpc]
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dcec8ffd>] rpc_call_sync+0x2d/0x40 
> > [sunrpc]
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dced680d>] rpcb_register+0x10d/0x1c0 
> > [sunrpc]
> > Jul 26 13:09:19 fb07-iapwap2 kernel:   [<dced06ef>] svc_register+0x8f/0x160 
> > [sunrpc]
> [continues]

That particular hang in rpciod_down we do have a fix for, but it is not
related to the issue you were seeing Jeff.

Trond


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