While running CPU hotplug testing on arm64 db410c device the following
kernel warning
noticed on linux stable-rc 4.19 branch. I did not bisect this problem yet.
Kernel Warning log:
------------------------------
[ 290.463053] CPU1: shutdown
[ 290.463107] psci: CPU1 killed (polled 0 ms)
[ 290.527026] CPU2: shutdown
[ 290.527072] psci: CPU2 killed (polled 0 ms)
[ 290.579064] CPU3: shutdown
[ 290.579098] psci: CPU3 killed (polled 0 ms)
[ 290.612295] Detected VIPT I-cache on CPU1
[ 290.612361] CPU1: Booted secondary processor 0x0000000001 [0x410fd030]
[ 290.684091] Detected VIPT I-cache on CPU2
[ 290.684158] CPU2: Booted secondary processor 0x0000000002 [0x410fd030]
[ 290.684464] WARNING: CPU: 2 PID: 20 at
/usr/src/kernel/kernel/workqueue.c:4762
workqueue_online_cpu+0x18c/0x428
[ 290.697731] Modules linked in: sch_ingress algif_hash test_bpf
snd_soc_hdmi_codec crc32_ce adv7511 cec rfkill msm
snd_soc_msm8916_analog snd_soc_lpass_apq8016 mdt_loader
snd_soc_lpass_cpu snd_soc_msm8916_digital snd_soc_apq8016_sbc
drm_kms_helper snd_soc_lpass_platform drm drm_panel_orientation_quirks
fuse [last unloaded: test_bpf]
[ 290.714992] CPU: 2 PID: 20 Comm: cpuhp/2 Tainted: G D
4.19.156-rc1 #1
[ 290.737221] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[ 290.745033] pstate: 40000005 (nZcv daif -PAN -UAO)
[ 290.751718] pc : workqueue_online_cpu+0x18c/0x428
[ 290.756316] lr : workqueue_online_cpu+0x140/0x428
[ 290.761086] sp : ffff00000a90bc90
[ 290.765774] x29: ffff00000a90bc90 x28: ffff00000989bfc8
[ 290.769074] x27: ffff80003ac81a00 x26: ffff000009914a00
[ 290.774456] x25: ffff00000989c068 x24: ffff00000a90bd24
[ 290.779752] x23: 0000000000000002 x22: ffff80003fe7a4d0
[ 290.785047] x21: ffff000009914000 x20: ffff00000989bf68
[ 290.790341] x19: ffff80003fe7a1c0 x18: ffffffffffffffff
[ 290.795636] x17: 0000000000000000 x16: 0000000000000000
[ 290.800932] x15: ffff00000987fa48 x14: ffff00000a69c530
[ 290.806227] x13: 0000000000000040 x12: 0000000000000228
[ 290.811522] x11: 0000000000000000 x10: ffff00000987fa48
[ 290.816816] x9 : ffff000009914000 x8 : ffff00000987fa48
[ 290.822112] x7 : ffff00000812d338 x6 : 0000000000000000
[ 290.827407] x5 : 0000000000000000 x4 : ffff80003c59ad00
[ 290.832702] x3 : ffff000009880000 x2 : 8b427f82388e4a00
[ 290.837997] x1 : 0000000000000000 x0 : 00000000ffffffea
[ 290.843293] Call trace:
[ 290.848588] workqueue_online_cpu+0x18c/0x428
[ 290.850762] cpuhp_invoke_callback+0xe8/0xd18
[ 290.855274] cpuhp_thread_fun+0x1a8/0x250
[ 290.859613] smpboot_thread_fn+0x1c4/0x2d0
[ 290.863606] kthread+0x150/0x168
[ 290.867600] ret_from_fork+0x10/0x1c
[ 290.870983] irq event stamp: 158
[ 290.874546] hardirqs last enabled at (157): [<ffff000009001784>]
_raw_spin_unlock_irqrestore+0x74/0xb0
[ 290.877765] hardirqs last disabled at (158): [<ffff000008ffa1e0>]
__schedule+0xc0/0xbc0
[ 290.886878] softirqs last enabled at (0): [<ffff0000080efac8>]
copy_process.isra.5.part.6+0x490/0x1b20
[ 290.894861] softirqs last disabled at (0): [<0000000000000000>]
(null)
[ 290.904233] ---[ end trace 7a9cb6558129244f ]---
steps to reproduce:
----------------------------------
Total number of CPU[0-3]
offline each CPU 1, 2 and 3
online each CPU 1, 2 and 3
echo 0 > /sys/devices/system/cpu/cpu1/online
echo 0 > /sys/devices/system/cpu/cpu2/online
echo 0 > /sys/devices/system/cpu/cpu3/online
echo 1 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu2/online
echo 1 > /sys/devices/system/cpu/cpu3/online
Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
metadata:
git branch: linux-4.19.y
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git describe: v4.19.155-72-g4d10cdd4ac50
kernel-config:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/dragonboard-410c/lkft/linux-stable-rc-4.19/666/config
ref:
https://lkft.validation.linaro.org/scheduler/job/1927553#L3876
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-4.19.y/build/v4.19.155-72-g4d10cdd4ac50/testrun/3416766/suite/linux-log-parser/test/check-kernel-warning-1925672/log
--
Linaro LKFT
https://lkft.linaro.org
