Re: [drm/fb] 1d46491d4a: WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work[drm_kms_helper]

From: Oliver Sang
Date: Thu Dec 03 2020 - 03:23:22 EST

On Thu, Dec 03, 2020 at 08:41:49AM +0100, Thomas Zimmermann wrote:
> Hi
>
> there should be a line in the kernel log that says something like "Damage
> blitter failed" with an error code. Is there any chance of recovering it?
>

Hi Thomas,

we attached dmesg in original report, where below comes from.

[ 28.258177] ------------[ cut here ]------------
[ 28.259527] bochs-drm 0000:00:02.0: Damage blitter failed: ret=-12
[ 28.261007] WARNING: CPU: 0 PID: 122 at drivers/gpu/drm/drm_fb_helper.c:434 drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
[ 28.263802] Modules linked in: locktorture(E) torture(E) mousedev(E) ppdev(E) psmouse(E) crc32c_intel(E) input_leds(E) bochs_drm(E) drm_vram_helper(E) drm_ttm_helper(E) ttm(E) drm_kms_helper(E) parport_pc(E) rtc_cmos(E) parport(E) drm(E) evbug(E) i6300esb(E) i2c_piix4(E) autofs4(E)
[ 28.271897] CPU: 0 PID: 122 Comm: kworker/0:2 Tainted: G E 5.10.0-rc3-01102-g1d46491d4a08 #1
[ 28.273904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 28.275819] Workqueue: events drm_fb_helper_damage_work [drm_kms_helper]
[ 28.279884] EIP: drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]


> Best regards
> Thomas
>
> Am 02.12.20 um 03:29 schrieb kernel test robot:
> >
> > Greeting,
> >
> > FYI, we noticed the following commit (built with gcc-9):
> >
> > commit: 1d46491d4a08d7ee657e09808f87d169444a2652 ("drm/fb-helper: Move damage blit code and its setup into separate routine")
> > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> >
> >
> > in testcase: locktorture
> > version:
> > with following parameters:
> >
> > runtime: 300s
> > test: cpuhotplug
> >
> > test-description: This torture test consists of creating a number of kernel threads which acquire the lock and hold it for specific amount of time, thus simulating different critical region behaviors.
> > test-url: https://www.kernel.org/doc/Documentation/locking/locktorture.txt
> >
> >
> > 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):
> >
> >
> > +---------------------------------------------------------------------------------------+------------+------------+
> > | | fd2d856538 | 1d46491d4a |
> > +---------------------------------------------------------------------------------------+------------+------------+
> > | WARNING:at_drivers/gpu/drm/drm_fb_helper.c:#drm_fb_helper_damage_work[drm_kms_helper] | 0 | 26 |
> > | EIP:drm_fb_helper_damage_work | 0 | 26 |
> > +---------------------------------------------------------------------------------------+------------+------------+
> >
> >
> > If you fix the issue, kindly add following tag
> > Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> >
> >
> > [ 28.261007] WARNING: CPU: 0 PID: 122 at drivers/gpu/drm/drm_fb_helper.c:434 drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.263802] Modules linked in: locktorture(E) torture(E) mousedev(E) ppdev(E) psmouse(E) crc32c_intel(E) input_leds(E) bochs_drm(E) drm_vram_helper(E) drm_ttm_helper(E) ttm(E) drm_kms_helper(E) parport_pc(E) rtc_cmos(E) parport(E) drm(E) evbug(E) i6300esb(E) i2c_piix4(E) autofs4(E)
> > [ 28.271897] CPU: 0 PID: 122 Comm: kworker/0:2 Tainted: G E 5.10.0-rc3-01102-g1d46491d4a08 #1
> > [ 28.273904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
> > [ 28.275819] Workqueue: events drm_fb_helper_damage_work [drm_kms_helper]
> > [ 28.279884] EIP: drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.281467] Code: 47 10 8b 58 2c 85 db 0f 84 bc 01 00 00 e8 1f f0 da f4 89 74 24 0c 89 5c 24 08 89 44 24 04 c7 04 24 98 c1 40 df e8 f7 50 1d f5 <0f> 0b 31 c9 c7 04 24 01 00 00 00 ba 01 00 00 00 b8 3c e8 40 df e8
> > [ 28.285055] EAX: 00000036 EBX: c1c91420 ECX: 00000000 EDX: 00000000
> > [ 28.289443] ESI: fffffff4 EDI: d2014000 EBP: d2c0dee4 ESP: d2c0de9c
> > [ 28.291058] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010292
> > [ 28.292717] CR0: 80050033 CR2: b727a028 CR3: 12141000 CR4: 00040690
> > [ 28.294316] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> > [ 28.295915] DR6: fffe0ff0 DR7: 00000400
> > [ 28.300768] Call Trace:
> > [ 28.302117] process_one_work+0x31b/0x7b0
> > [ 28.303532] ? process_one_work+0x272/0x7b0
> > [ 28.304976] worker_thread+0x29a/0x5d0
> > [ 28.308712] ? process_one_work+0x7b0/0x7b0
> > [ 28.310129] kthread+0x181/0x1a0
> > [ 28.311464] ? process_one_work+0x7b0/0x7b0
> > [ 28.312878] ? kthread_create_worker_on_cpu+0x30/0x30
> > [ 28.314318] ret_from_fork+0x1c/0x28
> > [ 28.315645] CPU: 0 PID: 122 Comm: kworker/0:2 Tainted: G E 5.10.0-rc3-01102-g1d46491d4a08 #1
> > [ 28.317414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
> > [ 28.319096] Workqueue: events drm_fb_helper_damage_work [drm_kms_helper]
> > [ 28.320674] Call Trace:
> > [ 28.321947] dump_stack+0x6d/0x8b
> > [ 28.323278] __warn.cold+0x24/0x49
> > [ 28.324639] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.326167] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.327670] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.329165] report_bug+0xb0/0xf0
> > [ 28.330438] ? irq_work_queue+0x13/0x70
> > [ 28.331729] ? exc_overflow+0x60/0x60
> > [ 28.333002] handle_bug+0x2a/0x50
> > [ 28.334227] exc_invalid_op+0x28/0x80
> > [ 28.335462] handle_exception+0x15d/0x15d
> > [ 28.336729] EIP: drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.338148] Code: 47 10 8b 58 2c 85 db 0f 84 bc 01 00 00 e8 1f f0 da f4 89 74 24 0c 89 5c 24 08 89 44 24 04 c7 04 24 98 c1 40 df e8 f7 50 1d f5 <0f> 0b 31 c9 c7 04 24 01 00 00 00 ba 01 00 00 00 b8 3c e8 40 df e8
> > [ 28.341442] EAX: 00000036 EBX: c1c91420 ECX: 00000000 EDX: 00000000
> > [ 28.342910] ESI: fffffff4 EDI: d2014000 EBP: d2c0dee4 ESP: d2c0de9c
> > [ 28.344372] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010292
> > [ 28.345883] ? cpu_latency_qos_write+0xeb/0xf0
> > [ 28.347203] ? run_init_process+0x5b/0x158
> > [ 28.348483] ? run_init_process+0x5b/0x158
> > [ 28.349714] ? exc_overflow+0x60/0x60
> > [ 28.350895] ? drm_fb_helper_damage_work+0x109/0x2d0 [drm_kms_helper]
> > [ 28.352244] process_one_work+0x31b/0x7b0
> > [ 28.353432] ? process_one_work+0x272/0x7b0
> > [ 28.354599] worker_thread+0x29a/0x5d0
> > [ 28.355730] ? process_one_work+0x7b0/0x7b0
> > [ 28.356894] kthread+0x181/0x1a0
> > [ 28.357942] ? process_one_work+0x7b0/0x7b0
> > [ 28.359019] ? kthread_create_worker_on_cpu+0x30/0x30
> > [ 28.360134] ret_from_fork+0x1c/0x28
> > [ 28.376652] irq event stamp: 9469
> > [ 28.377678] hardirqs last enabled at (9477): [<d3903085>] console_unlock+0x515/0x650
> > [ 28.378986] hardirqs last disabled at (9484): [<d3902f95>] console_unlock+0x425/0x650
> > [ 28.380284] softirqs last enabled at (9464): [<d467123d>] __do_softirq+0x3fd/0x57c
> > [ 28.381595] softirqs last disabled at (9381): [<d382793c>] call_on_stack+0x4c/0x60
> > [ 28.382878] ---[ end trace b5fac24d1c204ab3 ]---
> >
> >
> > To reproduce:
> >
> > # build kernel
> > cd linux
> > cp config-5.10.0-rc3-01102-g1d46491d4a08 .config
> > make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
> > make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 INSTALL_MOD_PATH=<mod-install-dir> modules_install
> > cd <mod-install-dir>
> > find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
> >
> >
> > git clone https://github.com/intel/lkp-tests.git
> > cd lkp-tests
> > bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
> >
> >
> >
> > Thanks,
> > Oliver Sang
> >
>
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
>