Message-ID: <a5321807-f0ad-6e93-ffb8-931f270ebc3a@suse.de>
Date:   Tue, 24 Nov 2020 10:56:02 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
        kernel test robot <oliver.sang@...el.com>
Cc:     0day robot <lkp@...el.com>, airlied@...ux.ie,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        dri-devel@...ts.freedesktop.org, sam@...nborg.org,
        christian.koenig@....com
Subject: Re: [drm/fb] 6a1b34c0a3:
 WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work

Hi

Am 24.11.20 um 02:58 schrieb Xing Zhengjun:
> 
> 
> On 11/23/2020 4:04 PM, Thomas Zimmermann wrote:
>> Hi
>>
>> Am 22.11.20 um 15:18 schrieb kernel test robot:
>>>
>>> Greeting,
>>>
>>> FYI, we noticed the following commit (built with gcc-9):
>>>
>>> commit: 6a1b34c0a339fdc75d7932ad5702f2177c9d7a1c ("drm/fb-helper: 
>>> Move damage blit code and its setup into separate routine")
>>> url: 
>>> https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-fb-helper-Various-fixes-and-cleanups/20201120-182750 
>>>
>>>
>>>
>>> in testcase: trinity
>>> version: trinity-static-i386-x86_64-f93256fb_2019-08-28
>>> with following parameters:
>>>
>>>     runtime: 300s
>>>
>>> test-description: Trinity is a linux system call fuzz tester.
>>> test-url: http://codemonkey.org.uk/projects/trinity/
>>>
>>>
>>> on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 
>>> -m 8G
>>>
>>> caused below changes (please refer to attached dmesg/kmsg for entire 
>>> log/backtrace):
>>
>> That dmesg is full of messages like
>>
>> [  696.323556] alloc_vmap_area: 24 callbacks suppressed
>> [  696.323562] vmap allocation for size 3149824 failed: use 
>> vmalloc=<size> to increase size
>>
>> I think the test system needs to be reconfigured first.
>>
> 
> We have tried "vmalloc=256M" and "vmalloc=512M", the same warning still 
> happened.

I added a more descriptive error message before pushing the patch. This 
may help to find the problem's cause.

Best regards
Thomas

> 
> 
>> Best regards
>> Thomas
>>
>>>
>>>
>>> +-----------------------------------------------------------------------+------------+------------+ 
>>>
>>> |                                                                       
>>> | 154f2d1afd | 6a1b34c0a3 |
>>> +-----------------------------------------------------------------------+------------+------------+ 
>>>
>>> | 
>>> WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work 
>>> | 0          | 36         |
>>> | EIP:drm_fb_helper_damage_work | 0          | 36         |
>>> +-----------------------------------------------------------------------+------------+------------+ 
>>>
>>>
>>>
>>> If you fix the issue, kindly add following tag
>>> Reported-by: kernel test robot <oliver.sang@...el.com>
>>>
>>>
>>> [  106.616652] WARNING: CPU: 1 PID: 173 at 
>>> drivers/gpu/drm/drm_fb_helper.c:434 
>>> drm_fb_helper_damage_work+0x371/0x390
>>> [  106.627732] Modules linked in:
>>> [  106.632419] CPU: 1 PID: 173 Comm: kworker/1:2 Not tainted 
>>> 5.10.0-rc4-next-20201120-00007-g6a1b34c0a339 #3
>>> [  106.637806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), 
>>> BIOS 1.12.0-1 04/01/2014
>>> [  106.642853] Workqueue: events drm_fb_helper_damage_work
>>> [  106.647664] EIP: drm_fb_helper_damage_work+0x371/0x390
>>> [  106.652305] Code: b1 17 c7 01 68 bd 5b 2d c5 53 50 68 55 21 2d c5 
>>> 83 15 44 b1 17 c7 00 e8 ae bc b1 01 83 05 48 b1 17 c7 01 83 15 4c b1 
>>> 17 c7 00 <0f> 0b 83 05 50 b1 17 c7 01 83 15 54 b1 17 c7 00 83 c4 10 
>>> e9 78 fd
>>> [  106.663517] EAX: 0000002d EBX: c8730520 ECX: 00000847 EDX: 00000000
>>> [  106.668423] ESI: ca987000 EDI: cab274d8 EBP: f62f5f20 ESP: f62f5ee8
>>> [  106.673214] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 
>>> 00010246
>>> [  106.678295] CR0: 80050033 CR2: 00000000 CR3: 063a7000 CR4: 000406d0
>>> [  106.683160] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
>>> [  106.687967] DR6: fffe0ff0 DR7: 00000400
>>> [  106.690763] Call Trace:
>>> [  106.693394]  process_one_work+0x3ea/0xaa0
>>> [  106.693501] ixgbevf: Intel(R) 10 Gigabit PCI Express Virtual 
>>> Function Network Driver
>>> [  106.695300]  worker_thread+0x330/0x900
>>> [  106.697406] ixgbevf: Copyright (c) 2009 - 2018 Intel Corporation.
>>> [  106.702963]  kthread+0x190/0x210
>>> [  106.705709]  ? rescuer_thread+0x650/0x650
>>> [  106.708379]  ? kthread_insert_work_sanity_check+0x120/0x120
>>> [  106.711271]  ret_from_fork+0x1c/0x30
>>> [  106.713973] ---[ end trace dd528799d3369ac1 ]---
>>>
>>>
>>> To reproduce:
>>>
>>>          # build kernel
>>>     cd linux
>>>     cp config-5.10.0-rc4-next-20201120-00007-g6a1b34c0a339 .config
>>>     make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare 
>>> modules_prepare bzImage
>>>
>>>          git clone https://github.com/intel/lkp-tests.git
>>>          cd lkp-tests
>>>          bin/lkp qemu -k <bzImage> job-script # job-script is 
>>> attached in this email
>>>
>>>
>>>
>>> Thanks,
>>> Oliver Sang
>>>
>>
>>
>> _______________________________________________
>> LKP mailing list -- lkp@...ts.01.org
>> To unsubscribe send an email to lkp-leave@...ts.01.org
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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