linux-kernel - Re: e1000_netpoll() , BUG: sleeping function called from invalid context

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Date:   Sat, 18 Feb 2017 00:38:06 +0100
From:   Gabriel C <nix.or.die@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>
Subject: Re: e1000_netpoll() , BUG: sleeping function called from invalid
 context



On 18.02.2017 00:25, Cong Wang wrote:
> On Fri, Feb 17, 2017 at 3:16 PM, Gabriel C <nix.or.die@...il.com> wrote:
>>
>>
>> On 17.02.2017 23:38, Cong Wang wrote:
>>>
>>> On Fri, Feb 17, 2017 at 1:20 PM, Gabriel C <nix.or.die@...il.com> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> while poking at a different issue I found the following on my logs :
>>>>
>>>> [85362.132770] BUG: sleeping function called from invalid context at
>>>> kernel/irq/manage.c:110
>>>> [85362.132771] in_atomic(): 1, irqs_disabled(): 1, pid: 1153, name:
>>>> systemd-journal
>>>> [85362.132772] no locks held by systemd-journal/1153.
>>>> [85362.132772] irq event stamp: 60088359
>>>> [85362.132777] hardirqs last  enabled at (60088359): [<ffffffff810d07c2>]
>>>> vprintk_emit+0x432/0x470
>>>> [85362.132779] hardirqs last disabled at (60088358): [<ffffffff810d03ec>]
>>>> vprintk_emit+0x5c/0x470
>>>> [85362.132782] softirqs last  enabled at (60088258): [<ffffffff810688fd>]
>>>> __do_softirq+0x22d/0x290
>>>> [85362.132784] softirqs last disabled at (60088233): [<ffffffff81068c0a>]
>>>> irq_exit+0x6a/0xd0
>>>> [85362.132784] Preemption disabled at:
>>>> [85362.132787] [<ffffffff815203de>] write_msg+0x4e/0xf0
>>>> [85362.132790] CPU: 0 PID: 1153 Comm: systemd-journal Tainted: G
>>>> I
>>>> 4.10.0-rc8-debug-00001-ga1015e374d94-dirty #5
>>>> [85362.132791] Hardware name: FUJITSU                          PRIMERGY
>>>> TX200 S5             /D2709, BIOS 6.00 Rev. 1.14.2709
>>>> 02/04/2013
>>>> [85362.132792] Call Trace:
>>>> [85362.132796]  dump_stack+0x86/0xc1
>>>> [85362.132799]  ___might_sleep+0x213/0x230
>>>> [85362.132801]  __might_sleep+0x6b/0x80
>>>> [85362.132803]  synchronize_irq+0x33/0x90
>>>> [85362.132805]  ? __irq_put_desc_unlock+0x19/0x40
>>>> [85362.132807]  ? __disable_irq_nosync+0x4e/0x60
>>>> [85362.132808]  disable_irq+0x17/0x20
>>>
>>>
>>>
>>> Hmm, your kernel base version is 4.10.0-rc8 but the symbols here
>>> look like prior to my commit, because with my commit here should
>>> be disable_hardirq() calling synchronize_hardirq().
>>>
>>> Did you revert it or make any local changes?
>>
>>
>> The kernel is -rc8 with reverted d966564fcdc19e13eb6ba1fbe6b8101070339c3d
>> +
>> http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=202461e2f3c15dbfb05825d29ace0d20cdf55fa4
>> + an debug patch from Thomas to find these goldfish issues.
>> (
>> http://ftp.frugalware.org/pub/other/people/crazy/kernel/t/goldfish-debug.patch
>> )
>>
>> No other changes..
>
> That is weird, the stack trace doesn't match the source code for some reason.
> Can you objdump your e1000.ko module to see if that is true?
>

My card seems to use the e1000e driver which is buit-in..

Anyway here an objdump -x :

http://ftp.frugalware.org/pub/other/people/crazy/kernel/t/objdump-x_e1000.ko.txt