Hi Am 03.12.20 um 09:36 schrieb Oliver Sang:
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
Thanks, that's the line I was looking for. Errno 12 means out-of-memory. It's not something related to the fbdev code, but rather another instance of the test system running out of memory. Presumably, it comes from [1].
Best regards Thomas[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/gpu/drm/ttm/ttm_bo_util.c?id=1d46491d4a08d7ee657e09808f87d169444a2652#n475
[ 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
-- 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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