BB AI task blocked

[Andrew Elder]

I see

[  242.657917] INFO: task kworker/0:0:3 blocked for more than 120 seconds.

[  242.665199]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.673861] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.683700] INFO: task kworker/u4:0:5 blocked for more than 120 seconds.

[  242.691800]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.698581] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.707629] INFO: task kworker/0:2:142 blocked for more than 120 seconds.

[  242.715996]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.722650] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.731642] INFO: task kworker/u4:2:244 blocked for more than 120 seconds.

[  242.739737]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.746484] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.755801] INFO: task systemd-udevd:486 blocked for more than 120 seconds.

[  242.763672]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.770142] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.783125] INFO: task systemd-udevd:487 blocked for more than 120 seconds.

[  242.790899]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.809218] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.817941] INFO: task systemd-udevd:489 blocked for more than 120 seconds.

[  242.825040]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.835339] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.847988] INFO: task systemd-udevd:493 blocked for more than 120 seconds.

[  242.855104]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.861346] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.870140] INFO: task connmand:533 blocked for more than 120 seconds.

[  242.876735]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.882991] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.894217] INFO: task brcmf_wdog/mmc2:741 blocked for more than 120 seconds.

[  242.901475]       Tainted: G        W  O    4.14.108-ti-rt-r122 #1

[  242.907741] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

on my console not long after boot. Should I be concerned?

Has 4.14.108-ti-rt-r122 been tested on BB AI?

Is there a different PREMPT_RT kernel recommended for the BB AI?

Thanks,

Andrew

[Andrew Elder]

debian@beaglebone:/opt/scripts/tools$ uname -a

Linux beaglebone 4.14.108-ti-r113 #1 SMP PREEMPT Wed Jul 31 00:01:10 UTC 2019 armv7l GNU/Linux

Does not seem to have the same issue.

[Andrew Elder]

Similar observed with

debian@ai:~$ uname -a

Linux ai 4.19.73-ti-rt-r29 #1stretch SMP PREEMPT RT Wed Oct 9 21:13:08 UTC 2019 armv7l GNU/Linux

[  484.306447] INFO: task kworker/u4:0:7 blocked for more than 120 seconds.

[  484.313237]       Tainted: G        W  O      4.19.73-ti-rt-r29 #1stretch

[  484.320145] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  484.329172] INFO: task kworker/1:1:66 blocked for more than 120 seconds.

[  484.336062]       Tainted: G        W  O      4.19.73-ti-rt-r29 #1stretch

[  484.342924] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  484.355157] INFO: task kworker/u5:0:68 blocked for more than 120 seconds.

[  484.362016]       Tainted: G        W  O      4.19.73-ti-rt-r29 #1stretch

[  484.368869] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.   

On Friday, October 25, 2019 at 11:13:02 AM UTC-4, Andrew Elder wrote:

[John Allwine]

Does anyone know anything about this? I'm seeing similar behavior on kernel 4.14.108-ti-rt-r134. I can't even ssh in anymore because something is hung at startup (I used to be able to, but I'm not sure why). After booting with a known good microSD card and checking kern.log, I see this:

[  242.872658] INFO: task systemd-udevd:351 blocked for more than 120 seconds.

[  242.879698]       Tainted: G        W  O    4.14.108-ti-rt-r134 #1stretch

[  242.886558] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.894551] systemd-udevd   D    0   351    332 0x00000101

[  242.894623] [<c0cd4b84>] (__schedule) from [<c0cd5010>] (schedule+0x64/0x108)

[  242.894661] [<c0cd5010>] (schedule) from [<c07f6f14>] (__mmc_claim_host+0xb4/0x1d0)

[  242.894700] [<c07f6f14>] (__mmc_claim_host) from [<c0805878>] (sdio_claim_host+0x2c/0x44)

[  242.894737] [<c0805878>] (sdio_claim_host) from [<c0804b3c>] (sdio_bus_probe+0x80/0x12c)

[  242.894783] [<c0804b3c>] (sdio_bus_probe) from [<c08a9234>] (driver_probe_device+0x2d4/0x480)

[  242.894826] [<c08a9234>] (driver_probe_device) from [<c08a94ec>] (__driver_attach+0x10c/0x128)

[  242.894867] [<c08a94ec>] (__driver_attach) from [<c08a6c4c>] (bus_for_each_dev+0x8c/0xd0)

[  242.894907] [<c08a6c4c>] (bus_for_each_dev) from [<c08a89a0>] (driver_attach+0x2c/0x30)

[  242.894945] [<c08a89a0>] (driver_attach) from [<c08a8304>] (bus_add_driver+0x1b8/0x278)

[  242.894986] [<c08a8304>] (bus_add_driver) from [<c08aa378>] (driver_register+0x88/0x104)

[  242.895024] [<c08aa378>] (driver_register) from [<c0804da0>] (sdio_register_driver+0x34/0x38)

[  242.895082] [<c0804da0>] (sdio_register_driver) from [<bf40f02c>] (btsdio_init+0x2c/0x1000 [btsdio])

[  242.895152] [<bf40f02c>] (btsdio_init [btsdio]) from [<c01019a8>] (do_one_initcall+0x64/0x19c)

[  242.895196] [<c01019a8>] (do_one_initcall) from [<c01efeac>] (do_init_module+0x74/0x210)

[  242.895238] [<c01efeac>] (do_init_module) from [<c01ee9e4>] (load_module+0x22a0/0x29f8)

[  242.895324] [<c01ee9e4>] (load_module) from [<c01ef2e0>] (SyS_init_module+0x1a4/0x1e0)

[  242.895369] [<c01ef2e0>] (SyS_init_module) from [<c0108e78>] (__sys_trace_return+0x0/0x10)

[  242.895424] INFO: task connmand:526 blocked for more than 120 seconds.

[  242.902076]       Tainted: G        W  O    4.14.108-ti-rt-r134 #1stretch

[  242.908948] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.916849] connmand        D    0   526      1 0x00000000

[  242.916920] [<c0cd4b84>] (__schedule) from [<c0cd5010>] (schedule+0x64/0x108)

[  242.916958] [<c0cd5010>] (schedule) from [<c07f6f14>] (__mmc_claim_host+0xb4/0x1d0)

[  242.916995] [<c07f6f14>] (__mmc_claim_host) from [<c0805878>] (sdio_claim_host+0x2c/0x44)

[  242.917206] [<c0805878>] (sdio_claim_host) from [<bf2ce30c>] (brcmf_sdio_bus_txctl+0x134/0x1a0 [brcmfmac])

[  242.917551] [<bf2ce30c>] (brcmf_sdio_bus_txctl [brcmfmac]) from [<bf2c8d0c>] (brcmf_proto_bcdc_msg+0xb4/0xb8 [brcmfmac])

[  242.917895] [<bf2c8d0c>] (brcmf_proto_bcdc_msg [brcmfmac]) from [<bf2c8d48>] (brcmf_proto_bcdc_set_dcmd+0x38/0x100 [brcmfmac])

[  242.918234] [<bf2c8d48>] (brcmf_proto_bcdc_set_dcmd [brcmfmac]) from [<bf2bf06c>] (brcmf_fil_cmd_data+0x88/0xb4 [brcmfmac])

[  242.918572] [<bf2bf06c>] (brcmf_fil_cmd_data [brcmfmac]) from [<bf2bf49c>] (brcmf_fil_iovar_data_set+0x94/0xb8 [brcmfmac])

[  242.918909] [<bf2bf49c>] (brcmf_fil_iovar_data_set [brcmfmac]) from [<bf2bf5c8>] (brcmf_fil_iovar_int_set+0x3c/0x58 [brcmfmac])

[  242.919241] [<bf2bf5c8>] (brcmf_fil_iovar_int_set [brcmfmac]) from [<bf2b11ac>] (brcmf_configure_arp_nd_offload+0x50/0x70 [brcmfmac])

[  242.919754] [<bf2b11ac>] (brcmf_configure_arp_nd_offload [brcmfmac]) from [<bf2bab18>] (brcmf_cfg80211_up+0x2ec/0x3a4 [brcmfmac])

[  242.920108] [<bf2bab18>] (brcmf_cfg80211_up [brcmfmac]) from [<bf2c46d0>] (brcmf_netdev_open+0xac/0x128 [brcmfmac])

[  242.920319] [<bf2c46d0>] (brcmf_netdev_open [brcmfmac]) from [<c0b207d0>] (__dev_open+0xe4/0x15c)

[  242.920368] [<c0b207d0>] (__dev_open) from [<c0b20be4>] (__dev_change_flags+0x1a4/0x1d0)

[  242.920412] [<c0b20be4>] (__dev_change_flags) from [<c0b20c38>] (dev_change_flags+0x28/0x58)

[  242.920451] [<c0b20c38>] (dev_change_flags) from [<c0bd7478>] (devinet_ioctl+0x704/0x7cc)

[  242.920489] [<c0bd7478>] (devinet_ioctl) from [<c0bd9b30>] (inet_ioctl+0x1a4/0x1d0)

[  242.920532] [<c0bd9b30>] (inet_ioctl) from [<c0af7d9c>] (sock_ioctl+0x15c/0x300)

[  242.920571] [<c0af7d9c>] (sock_ioctl) from [<c031b7e8>] (do_vfs_ioctl+0xc0/0x94c)

[  242.920604] [<c031b7e8>] (do_vfs_ioctl) from [<c031c0f0>] (SyS_ioctl+0x7c/0x8c)

[  242.920651] [<c031c0f0>] (SyS_ioctl) from [<c0108ca0>] (ret_fast_syscall+0x0/0x5c)

[Robert Nelson]

On Mon, May 4, 2020 at 8:45 AM John Allwine <jo...@pocketnc.com> wrote:
>
> Does anyone know anything about this? I'm seeing similar behavior on kernel 4.14.108-ti-rt-r134. I can't even ssh in anymore because something is hung at startup (I used to be able to, but I'm not sure why). After booting with a known good microSD card and checking kern.log, I see this:

It's our "lovely" non-mainline "brcmfmac" driver.. It' fub-bar'd for RT..

v4.14.x uses this 150+ patchset: https://community.cypress.com/docs/DOC-19000

Regards,

--
Robert Nelson
https://rcn-ee.com/

[John Allwine]

That's the driver for Wifi chip? How can I disable that driver and anything trying to use it?

[Robert Nelson]

On Mon, May 4, 2020 at 8:50 AM John Allwine <jo...@pocketnc.com> wrote:
>
> That's the driver for Wifi chip? How can I disable that driver and anything trying to use it?

blacklist it ..

/etc/modprobe.d/brcmfmac-blacklist.conf

blacklist brcmfmac

[John Allwine]

That did it. Thank you, Robert!

--
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