Public bug reported: The following is observed when running heavier I/O to our NVMe/TCP target:
2024-06-11T23:16:42.773199+00:00 blr-r19-s33u kernel: INFO: rcu_tasks detected stalls on tasks: 2024-06-11T23:16:42.773232+00:00 blr-r19-s33u kernel: 000000003db97b04: .. nvcsw: 34791011/34791011 holdout: 1 idle_cpu: -1/1 2024-06-11T23:16:42.773236+00:00 blr-r19-s33u kernel: task:kworker/1:1H state:R running task stack:0 pid:881 tgid:881 ppid:2 flags:0x00004000 2024-06-11T23:16:42.773239+00:00 blr-r19-s33u kernel: Workqueue: nvme_tcp_wq nvme_tcp_io_work [nvme_tcp] 2024-06-11T23:16:42.773243+00:00 blr-r19-s33u kernel: Call Trace: 2024-06-11T23:16:42.773245+00:00 blr-r19-s33u kernel: <TASK> 2024-06-11T23:16:42.773247+00:00 blr-r19-s33u kernel: ? release_sock+0x8d/0xb0 2024-06-11T23:16:42.773249+00:00 blr-r19-s33u kernel: ? nvme_tcp_io_work+0x7f/0xe0 [nvme_tcp] 2024-06-11T23:16:42.773254+00:00 blr-r19-s33u kernel: ? process_one_work+0x16c/0x350 2024-06-11T23:16:42.773257+00:00 blr-r19-s33u kernel: ? worker_thread+0x306/0x440 2024-06-11T23:16:42.773259+00:00 blr-r19-s33u kernel: ? _raw_spin_lock_irqsave+0xe/0x20 2024-06-11T23:16:42.773262+00:00 blr-r19-s33u kernel: ? __pfx_worker_thread+0x10/0x10 2024-06-11T23:16:42.773265+00:00 blr-r19-s33u kernel: ? kthread+0xef/0x120 2024-06-11T23:16:42.773267+00:00 blr-r19-s33u kernel: ? __pfx_kthread+0x10/0x10 2024-06-11T23:16:42.773270+00:00 blr-r19-s33u kernel: ? ret_from_fork+0x44/0x70 2024-06-11T23:16:42.773273+00:00 blr-r19-s33u kernel: ? __pfx_kthread+0x10/0x10 2024-06-11T23:16:42.773276+00:00 blr-r19-s33u kernel: ? ret_from_fork_asm+0x1b/0x30 root@blr-r19-s33u:~# uname -a Linux blr-r19-s33u 6.8.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 00:40:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux root@blr-r19-s33u:~# uname -r 6.8.0-31-generic root@blr-r19-s33u:~# cat /etc/os-release PRETTY_NAME="Ubuntu 24.04 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy -policy" UBUNTU_CODENAME=noble LOGO=ubuntu-logo root@blr-r19-s33u:~# ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069207 Title: rcu_tasks detected stalls on tasks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2069207/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs