linux-kernel - Re: oprofile? lockdep warning from 2.6.27-rc1-mm1

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Date:	Mon, 26 Jan 2009 16:02:03 +0100
From:	Robert Richter <robert.richter@....com>
To:	hooanon05@...oo.co.jp
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: oprofile? lockdep warning from 2.6.27-rc1-mm1

On 05.08.08 20:29:06, hooanon05@...oo.co.jp wrote:
> 
> Robert Richter:
> > this is new to me. I will take a look at this.
> 
> Thanks.
> Here is another message at shutdown time.

Junjiro,

I reworked the code around this bug and it is upstream in
v2.6.29-rc1. Could you test with this version and look if the problem
still exists, please?

Thanks,

-Robert

> 
> 
> Junjiro R. Okajima
> 
> ----------------------------------------------------------------------
> BUG: sleeping function called from invalid context at /home/jro/transparent/linux-2.6.27-rc1-mm1/kernel/sched.c:4613
> in_atomic():1, irqs_disabled():0
> 1 lock held by oprofiled/1843:
>  #0:  (start_mutex){--..}, at: [<c02d5c77>] oprofile_shutdown+0xf/0x5a
> Pid: 1843, comm: oprofiled Not tainted 2.6.27-rc1-mm1jrousD #1
>  [<c011ac79>] __might_sleep+0xdf/0x103
>  [<c03688a8>] wait_for_common+0x1f/0x140
>  [<c036e602>] ? sub_preempt_count+0x62/0xb0
>  [<c036bf14>] ? _spin_unlock_irqrestore+0x53/0x69
>  [<c0368a4b>] wait_for_completion+0x12/0x14
>  [<c01314fe>] synchronize_rcu+0x2d/0x33
>  [<c013154b>] ? wakeme_after_rcu+0x0/0xd
>  [<c0137cc5>] atomic_notifier_chain_unregister+0x2b/0x32
>  [<c0137cdb>] unregister_die_notifier+0xf/0x14
>  [<c02d787c>] nmi_shutdown+0x44/0x84
>  [<c02d5c94>] oprofile_shutdown+0x2c/0x5a
>  [<c02d697c>] event_buffer_release+0x10/0x3c
>  [<c01849a8>] __fput+0xc7/0x1b8
>  [<c0184e43>] fput+0x22/0x3b
>  [<c0181c32>] filp_close+0x43/0x69
>  [<c012266f>] ? exit_files+0x30/0x3c
>  [<c012261a>] put_files_struct+0xb1/0xd6
>  [<c0122676>] exit_files+0x37/0x3c
>  [<c0123b21>] do_exit+0x292/0x909
>  [<c013e854>] ? put_lock_stats+0x27/0x3a
>  [<c013e8b9>] ? lock_release_holdtime+0x52/0x6b
>  [<c0173114>] ? sys_munmap+0x3b/0x42
>  [<c01241dd>] do_group_exit+0x45/0x9d
>  [<c0124244>] sys_exit_group+0xf/0x11
>  [<c0103151>] sysenter_do_call+0x12/0x31
>  =======================
> 

-- 
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter@....com

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