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From: Jeff Layton <jeff.layton@primarydata.com>
Date: Wed, 25 Jun 2014 21:34:51 -0400
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Jeff Layton <jeff.layton@primarydata.com>, linux-nfs@vger.kernel.org
Subject: Re: [PATCH v1 000/104] nfsd: eliminate the client_mutex
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On Wed, 25 Jun 2014 21:26:29 -0400
"J. Bruce Fields" <bfields@fieldses.org> wrote:

> I'm seeing this, by the way.--b.
> 
> [  512.960652] nfsd: non-standard errno: -7
> [  650.442646] ------------[ cut here ]------------
> [  650.442754] WARNING: CPU: 3 PID: 647 at fs/nfsd/nfs4state.c:761
> revoke_delegation+0xa7/0xb0 [nfsd]()
> [  650.442760] Modules linked in: rpcsec_gss_krb5 nfsd auth_rpcgss
> oid_registry nfs_acl lockd sunrpc
> [  650.442792] CPU: 3 PID: 647 Comm: kworker/u8:2 Not tainted
> 3.16.0-rc2-00479-gb675b9c #2982
> [  650.442796] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
> [  650.442814] Workqueue: nfsd4 laundromat_main [nfsd]
> [  650.442821]  0000000000000009 ffff880036287c48 ffffffff81a439d6
> 0000000000000001
> [  650.442836]  0000000000000000 ffff880036287c88 ffffffff8106d65c
> ffff880036287c68
> [  650.442851]  ffff8800312aee60 ffff88001bcfe800 ffff8800312aeeb0
> ffffffff822c7cc0
> [  650.442865] Call Trace:
> [  650.442878]  [<ffffffff81a439d6>] dump_stack+0x4f/0x7c
> [  650.442889]  [<ffffffff8106d65c>] warn_slowpath_common+0x8c/0xc0
> [  650.442897]  [<ffffffff8106d6aa>] warn_slowpath_null+0x1a/0x20
> [  650.442917]  [<ffffffffa011a607>] revoke_delegation+0xa7/0xb0 [nfsd]
> [  650.442936]  [<ffffffffa011aaec>] laundromat_main+0x2dc/0x480 [nfsd]
> [  650.442956]  [<ffffffffa011a9f4>] ? laundromat_main+0x1e4/0x480
> [nfsd]
> [  650.442967]  [<ffffffff8108924e>] process_one_work+0x1ce/0x500
> [  650.442976]  [<ffffffff810891db>] ? process_one_work+0x15b/0x500
> [  650.442985]  [<ffffffff81089b9b>] worker_thread+0x11b/0x4f0
> [  650.442995]  [<ffffffff810bba2d>] ? trace_hardirqs_on+0xd/0x10
> [  650.443004]  [<ffffffff81a4c36b>] ?
> _raw_spin_unlock_irqrestore+0x4b/0x80
> [  650.443013]  [<ffffffff81089a80>] ? init_pwq+0x190/0x190
> [  650.443022]  [<ffffffff81090ac4>] kthread+0xe4/0x100
> [  650.443032]  [<ffffffff810909e0>] ? __init_kthread_worker+0x70/0x70
> [  650.443041]  [<ffffffff81a4caac>] ret_from_fork+0x7c/0xb0
> [  650.443050]  [<ffffffff810909e0>] ? __init_kthread_worker+0x70/0x70
> [  650.443055] ---[ end trace e3faa7f0516143d3 ]---

Thanks, I think I just whacked that bug a little while ago:

    http://git.samba.org/?p=jlayton/linux.git;a=commitdiff;h=81771b60b6fd17dae7975a2e3199fc37d181dacf

...I've squashed quite a few others in the last few days as well. I'm
hoping to post an updated set in the next day or so.

-- 
Jeff Layton <jlayton@primarydata.com>