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RPIgoodSBC
Posts: 127
Joined: Tue Mar 20, 2018 11:37 am

Is this kernel warning important?

Fri Aug 02, 2019 11:02 am

My pi4 is working fine but I see this output dmesg and I want to know if it is important or can help to a developer to trace any problem...

Code: Select all

sudo dmesg
[ 1849.557286] ------------[ cut here ]------------
[ 1849.557367] WARNING: CPU: 3 PID: 437 at drivers/gpu/drm/vc4/vc4_firmware_kms.c:899 vc4_crtc_atomic_flush+0x98/0x9c [vc4]
[ 1849.557377] Modules linked in: rfcomm bnep hci_uart btbcm serdev bluetooth ecdh_generic fuse 8021q garp stp llc it913x vc4 af9033 v3d gpu_sched drm_kms_helper drm drm_panel_orientation_quirks snd_soc_core snd_compress snd_pcm_dmaengine syscopyarea sysfillrect sysimgblt fb_sys_fops brcmfmac brcmutil raspberrypi_hwmon hwmon joydev sha256_generic dvb_usb_af9035 sg dvb_usb_v2 dvb_core evdev cfg80211 rfkill snd_bcm2835(C) snd_pcm snd_timer snd bcm2835_codec(C) bcm2835_v4l2(C) v4l2_mem2mem bcm2835_mmal_vchiq(C) videobuf2_dma_contig v4l2_common videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev media vc_sm_cma(C) argon_mem fixed uio_pdrv_genirq uio i2c_dev ip_tables x_tables ipv6
[ 1849.557973] CPU: 3 PID: 437 Comm: Xorg Tainted: G C 4.19.58-v7l+ #1245
[ 1849.557982] Hardware name: BCM2835
[ 1849.558016] [<c0212c8c>] (unwind_backtrace) from [<c020d49c>] (show_stack+0x20/0x24)
[ 1849.558037] [<c020d49c>] (show_stack) from [<c09763e0>] (dump_stack+0xd4/0x118)
[ 1849.558058] [<c09763e0>] (dump_stack) from [<c0222270>] (__warn+0x104/0x11c)
[ 1849.558074] [<c0222270>] (__warn) from [<c02223c0>] (warn_slowpath_null+0x50/0x58)
[ 1849.558135] [<c02223c0>] (warn_slowpath_null) from [<bf8d3a08>] (vc4_crtc_atomic_flush+0x98/0x9c [vc4])
[ 1849.558290] [<bf8d3a08>] (vc4_crtc_atomic_flush [vc4]) from [<bf85f81c>] (drm_atomic_helper_commit_planes+0x1a4/0x298 [drm_kms_helper])
[ 1849.558425] [<bf85f81c>] (drm_atomic_helper_commit_planes [drm_kms_helper]) from [<bf8d5144>] (vc4_atomic_complete_commit+0x60/0x33c [vc4])
[ 1849.558516] [<bf8d5144>] (vc4_atomic_complete_commit [vc4]) from [<bf8d5500>] (vc4_atomic_commit+0xe0/0x194 [vc4])
[ 1849.558736] [<bf8d5500>] (vc4_atomic_commit [vc4]) from [<bf748410>] (drm_atomic_commit+0x5c/0x60 [drm])
[ 1849.559080] [<bf748410>] (drm_atomic_commit [drm]) from [<bf74a508>] (drm_mode_atomic_ioctl+0x98c/0xb78 [drm])
[ 1849.559405] [<bf74a508>] (drm_mode_atomic_ioctl [drm]) from [<bf735bc4>] (drm_ioctl_kernel+0xb4/0xf0 [drm])
[ 1849.559721] [<bf735bc4>] (drm_ioctl_kernel [drm]) from [<bf735ff8>] (drm_ioctl+0x230/0x3cc [drm])
[ 1849.559890] [<bf735ff8>] (drm_ioctl [drm]) from [<c03c3f64>] (do_vfs_ioctl+0xbc/0x804)
[ 1849.559911] [<c03c3f64>] (do_vfs_ioctl) from [<c03c46f0>] (ksys_ioctl+0x44/0x6c)
[ 1849.559929] [<c03c46f0>] (ksys_ioctl) from [<c03c4730>] (sys_ioctl+0x18/0x1c)
[ 1849.559946] [<c03c4730>] (sys_ioctl) from [<c0201000>] (ret_fast_syscall+0x0/0x28)
[ 1849.559956] Exception stack(0xdb4e9fa8 to 0xdb4e9ff0)
[ 1849.559968] 9fa0: 01a14618 bed7ba78 0000000c c03864bc bed7ba78 00000000
[ 1849.559981] 9fc0: 01a14618 bed7ba78 c03864bc 00000036 0185a578 01da3160 01b54fe8 00000033
[ 1849.559990] 9fe0: b6cf408c bed7ba44 b6cdb594 b696751c
[ 1849.560001] ---[ end trace e932eb672503181e ]---
[10609.435417] ------------[ cut here ]------------
[10609.435616] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/drm_vblank.c:1026 drm_vblank_put+0xf0/0x100 [drm]
[10609.435624] Modules linked in: rfcomm bnep hci_uart btbcm serdev bluetooth ecdh_generic fuse 8021q garp stp llc it913x vc4 af9033 v3d gpu_sched drm_kms_helper drm drm_panel_orientation_quirks snd_soc_core snd_compress snd_pcm_dmaengine syscopyarea sysfillrect sysimgblt fb_sys_fops brcmfmac brcmutil raspberrypi_hwmon hwmon joydev sha256_generic dvb_usb_af9035 sg dvb_usb_v2 dvb_core evdev cfg80211 rfkill snd_bcm2835(C) snd_pcm snd_timer snd bcm2835_codec(C) bcm2835_v4l2(C) v4l2_mem2mem bcm2835_mmal_vchiq(C) videobuf2_dma_contig v4l2_common videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev media vc_sm_cma(C) argon_mem fixed uio_pdrv_genirq uio i2c_dev ip_tables x_tables ipv6
[10609.436094] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G WC 4.19.58-v7l+ #1245
[10609.436102] Hardware name: BCM2835
[10609.436134] [<c0212c8c>] (unwind_backtrace) from [<c020d49c>] (show_stack+0x20/0x24)
[10609.436154] [<c020d49c>] (show_stack) from [<c09763e0>] (dump_stack+0xd4/0x118)
[10609.436174] [<c09763e0>] (dump_stack) from [<c0222270>] (__warn+0x104/0x11c)
[10609.436191] [<c0222270>] (__warn) from [<c02223c0>] (warn_slowpath_null+0x50/0x58)
[10609.436368] [<c02223c0>] (warn_slowpath_null) from [<bf75620c>] (drm_vblank_put+0xf0/0x100 [drm])
[10609.436692] [<bf75620c>] (drm_vblank_put [drm]) from [<bf756240>] (drm_crtc_vblank_put+0x24/0x28 [drm])
[10609.436910] [<bf756240>] (drm_crtc_vblank_put [drm]) from [<bf8d3654>] (vc4_crtc_handle_page_flip+0x50/0x60 [vc4])
[10609.437010] [<bf8d3654>] (vc4_crtc_handle_page_flip [vc4]) from [<bf8d4f48>] (vc4_crtc_irq_handler+0xc8/0x144 [vc4])
[10609.437066] [<bf8d4f48>] (vc4_crtc_irq_handler [vc4]) from [<c02815a8>] (__handle_irq_event_percpu+0xc0/0x22c)
[10609.437083] [<c02815a8>] (__handle_irq_event_percpu) from [<c0281750>] (handle_irq_event_percpu+0x3c/0x8c)
[10609.437097] [<c0281750>] (handle_irq_event_percpu) from [<c02817f4>] (handle_irq_event+0x54/0x78)
[10609.437113] [<c02817f4>] (handle_irq_event) from [<c028564c>] (handle_fasteoi_irq+0xb4/0x194)
[10609.437132] [<c028564c>] (handle_fasteoi_irq) from [<c0280618>] (generic_handle_irq+0x34/0x44)
[10609.437150] [<c0280618>] (generic_handle_irq) from [<c0280d54>] (__handle_domain_irq+0x6c/0xc4)
[10609.437168] [<c0280d54>] (__handle_domain_irq) from [<c0202244>] (gic_handle_irq+0x4c/0x88)
[10609.437182] [<c0202244>] (gic_handle_irq) from [<c02019bc>] (__irq_svc+0x5c/0x7c)
[10609.437191] Exception stack(0xc1001ed8 to 0xc1001f20)
[10609.437202] 1ec0: c0209a84 00000000
[10609.437214] 1ee0: 40000093 40000093 c1004dbc c1000000 c1004e04 00000001 c10957ca c10a4a00
[10609.437226] 1f00: c0e67a38 c1001f34 c10051c4 c1001f28 00000000 c0209a88 40000013 ffffffff
[10609.437244] [<c02019bc>] (__irq_svc) from [<c0209a88>] (arch_cpu_idle+0x34/0x4c)
[10609.437264] [<c0209a88>] (arch_cpu_idle) from [<c09935a4>] (default_idle_call+0x34/0x48)
[10609.437283] [<c09935a4>] (default_idle_call) from [<c025423c>] (do_idle+0xec/0x17c)
[10609.437303] [<c025423c>] (do_idle) from [<c025458c>] (cpu_startup_entry+0x28/0x2c)
[10609.437321] [<c025458c>] (cpu_startup_entry) from [<c098cc80>] (rest_init+0xbc/0xc0)
[10609.437338] [<c098cc80>] (rest_init) from [<c0e00fe4>] (start_kernel+0x4b8/0x4e8)
[10609.437349] ---[ end trace e932eb672503181f ]---
pi@raspberrypi:~ $ uname -a
Linux raspberrypi 4.19.58-v7l+ #1245 SMP Fri Jul 12 17:31:45 BST 2019 armv7l GNU/Linux

---
This happens after some time after boot raspbian.

trejan
Posts: 3063
Joined: Tue Jul 02, 2019 2:28 pm

Re: Is this kernel warning important?

Fri Aug 02, 2019 11:35 am

Ignore it. Harmless warning. More details at https://github.com/raspberrypi/linux/issues/3020

User avatar
RPIgoodSBC
Posts: 127
Joined: Tue Mar 20, 2018 11:37 am

Re: Is this kernel warning important?

Fri Aug 02, 2019 11:47 am

trejan wrote:
Fri Aug 02, 2019 11:35 am
Ignore it. Harmless warning. More details at https://github.com/raspberrypi/linux/issues/3020
Ok.Thanks.

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