rcu_preempt detected expedited stalls on CPUs/tasks

[Stephen Crowley]

[ 3.740699] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 2-... } 6 jiffies s: 65 root: 0x1/.
[ 3.740714] rcu: blocking rcu_node structures (internal RCU debug): l=1:0-9:0x4/.
[ 3.740739] Task dump for CPU 2:
[ 3.740740] task:systemd-udevd state:R running task stack: 0 pid: 534 ppid: 516 flags:0x0000400a
[ 3.740743] Call Trace:
[ 3.740758] <TASK>
[ 3.740760] ? kallsyms_lookup+0x14/0x20
[ 3.740763] ? test_for_valid_rec+0x38/0x80
[ 3.740765] ? change_page_attr_set_clr+0x158/0x1d0
[ 3.740768] ? ftrace_module_enable+0xa6/0x210
[ 3.740770] ? load_module+0x636/0xcb0
[ 3.740772] ? __do_sys_finit_module+0xbd/0x130
[ 3.740773] ? __do_sys_finit_module+0xbd/0x130
[ 3.740775] ? __x64_sys_finit_module+0x18/0x20
[ 3.740776] ? do_syscall_64+0x58/0x80
[ 3.740778] ? ksys_mmap_pgoff+0x10c/0x250
[ 3.740780] ? exit_to_user_mode_prepare+0x30/0xa0
[ 3.740782] ? syscall_exit_to_user_mode+0x26/0x50
[ 3.740784] ? __x64_sys_mmap+0x33/0x50
[ 3.740785] ? do_syscall_64+0x67/0x80
[ 3.740786] ? __x64_sys_lseek+0x18/0x20
[ 3.740788] ? do_syscall_64+0x67/0x80
[ 3.740789] ? exit_to_user_mode_prepare+0x85/0xa0
[ 3.740791] ? syscall_exit_to_user_mode+0x26/0x50
[ 3.740792] ? do_syscall_64+0x67/0x80
[ 3.740793] ? do_syscall_64+0x67/0x80
[ 3.740794] ? sysvec_call_function+0x4b/0xa0
[ 3.740796] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 3.740797] </TASK>
[ 3.816703] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 2-... } 25 jiffies s: 65 root: 0x1/.
[ 3.816719] rcu: blocking rcu_node structures (internal RCU debug): l=1:0-9:0x4/.
[ 3.816745] Task dump for CPU 2:
[ 3.816745] task:systemd-udevd state:R running task stack: 0 pid: 534 ppid: 516 flags:0x0000400a
[ 3.816747] Call Trace:
[ 3.816748] <TASK>
[ 3.816749] ? kallsyms_lookup+0x14/0x20
[ 3.816751] ? test_for_valid_rec+0x38/0x80
[ 3.816753] ? change_page_attr_set_clr+0x158/0x1d0
[ 3.816755] ? ftrace_module_enable+0xa6/0x210
[ 3.816757] ? load_module+0x636/0xcb0
[ 3.816759] ? __do_sys_finit_module+0xbd/0x130
[ 3.816760] ? __do_sys_finit_module+0xbd/0x130
[ 3.816762] ? __x64_sys_finit_module+0x18/0x20
[ 3.816763] ? do_syscall_64+0x58/0x80
[ 3.816765] ? ksys_mmap_pgoff+0x10c/0x250
[ 3.816766] ? exit_to_user_mode_prepare+0x30/0xa0
[ 3.816768] ? syscall_exit_to_user_mode+0x26/0x50
[ 3.816770] ? __x64_sys_mmap+0x33/0x50
[ 3.816771] ? do_syscall_64+0x67/0x80
[ 3.816772] ? __x64_sys_lseek+0x18/0x20
[ 3.816773] ? do_syscall_64+0x67/0x80
[ 3.816774] ? exit_to_user_mode_prepare+0x85/0xa0
[ 3.816776] ? syscall_exit_to_user_mode+0x26/0x50
[ 3.816777] ? do_syscall_64+0x67/0x80
[ 3.816778] ? do_syscall_64+0x67/0x80
[ 3.816779] ? sysvec_call_function+0x4b/0xa0
[ 3.816781] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 3.816782] </TASK>

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: linux-image-5.19.0-15-generic 5.19.0-15.15
ProcVersionSignature: Ubuntu 5.19.0-15.15-generic 5.19.0
Uname: Linux 5.19.0-15-generic x86_64
ApportVersion: 2.23.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/seq: crow 1930 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: GNOME-Flashback:GNOME
Date: Tue Sep 27 18:51:41 2022
InstallationDate: Installed on 2022-09-10 (17 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
IwConfig:
 lo no wireless extensions.

 enp2s0 no wireless extensions.
MachineType: Dell Inc. XPS 8940
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-15-generic root=UUID=a8ff0852-c8bb-4cba-a02f-7acb738f7666 ro audit=0
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
 linux-restricted-modules-5.19.0-15-generic N/A
 linux-backports-modules-5.19.0-15-generic N/A
 linux-firmware 20220923.gitf09bebf3-0ubuntu1
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/08/2022
dmi.bios.release: 2.8
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.8.0
dmi.board.name: 0K3CM7
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.8.0:bd06/08/2022:br2.8:svnDellInc.:pnXPS8940:pvr:rvnDellInc.:rn0K3CM7:rvrA00:cvnDellInc.:ct3:cvr:sku09C5:
dmi.product.family: XPS
dmi.product.name: XPS 8940
dmi.product.sku: 09C5
dmi.sys.vendor: Dell Inc.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Boris Gjenero (boris-gjenero)]

I see lots of these errors on my Dell Inspiron 6400 when booting. They started after upgrading to Ubuntu 20.10. Everything still seems to work.

[Kleber Sacilotto de Souza (kleber-souza)]

Hi,

This bug a duplicate of bug 1991951, a fix is already applied and is scheduled to be released with the next 5.19 kernel update.