Public bug reported:
[Impact]
On certain bare metal arm64 boards the latest lunar/linux
6.2.0-17-generic fails to boot, the kernel gets stuck reporting the
following oops:
[ 72.043484] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 72.049571] rcu: 22-...0: (30 GPs behind) idle=b10c/1/0x4000000000000000
softirq=164/164 fqs=6443
[ 72.058520] (detected by 28, t=15005 jiffies, g=449, q=174 ncpus=32)
[ 72.064949] Task dump for CPU 22:
[ 72.068251] task:kworker/u64:5 state:R running task stack:0
pid:447 ppid:2 flags:0x0000000a
[ 72.078156] Workqueue: efi_rts_wq efi_call_rts
[ 72.082595] Call trace:
[ 72.085029] __switch_to+0xbc/0x100
The bug doesn't seem to happen on arm64 virtual machines, it happens
only on physical arm64 systems.
[Test case]
Boot the kernel on a physical arm64 board (i.e., kuzzle in our lab).
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: Incomplete
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2011748
Title:
lunar/linux 6.2 fails to boot on arm64
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Lunar:
Incomplete
Bug description:
[Impact]
On certain bare metal arm64 boards the latest lunar/linux
6.2.0-17-generic fails to boot, the kernel gets stuck reporting the
following oops:
[ 72.043484] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 72.049571] rcu: 22-...0: (30 GPs behind)
idle=b10c/1/0x4000000000000000 softirq=164/164 fqs=6443
[ 72.058520] (detected by 28, t=15005 jiffies, g=449, q=174 ncpus=32)
[ 72.064949] Task dump for CPU 22:
[ 72.068251] task:kworker/u64:5 state:R running task stack:0
pid:447 ppid:2 flags:0x0000000a
[ 72.078156] Workqueue: efi_rts_wq efi_call_rts
[ 72.082595] Call trace:
[ 72.085029] __switch_to+0xbc/0x100
The bug doesn't seem to happen on arm64 virtual machines, it happens
only on physical arm64 systems.
[Test case]
Boot the kernel on a physical arm64 board (i.e., kuzzle in our lab).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2011748/+subscriptions
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