[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
*** This bug is a duplicate of bug 1773964 *** https://bugs.launchpad.net/bugs/1773964 ** Tags added: cscc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
*** This bug is a duplicate of bug 1773964 *** https://bugs.launchpad.net/bugs/1773964 This bug has been marked as a duplicate of LP#1773964 in Launchpad. Please see that bug for updates. Thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
*** This bug is a duplicate of bug 1773964 *** https://bugs.launchpad.net/bugs/1773964 ** This bug has been marked a duplicate of bug 1773964 IPL: ppc64_cpu --frequency hang with INFO: rcu_sched detected stalls on CPUs/tasks on w34 and wsbmc016 with 920.1714.20170330n -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
SRU Request Submitted: https://lists.ubuntu.com/archives/kernel-team/2018-June/093483.html ** Description changed: + == SRU Justification == + IBM is seeing kernel traces during testing. This is due to a missing + backport of some kernel fixes in the RTC driver, which is commit + 682e6b4da5cb. Commit 682e6b4da5cb was also cc'd to upstream stable, but + it has not landed in Bionic as of yet. It is also a fix to upstream + commit 628daa8d5abf. + + Commit 34dd25de9fe3 is also needed as a prereq to define + OPAL_BUSY_DELAY_MS. + + == Fixes == + 34dd25de9fe3 ("powerpc/powernv: define a standard delay for OPAL_BUSY type retry loops") + 682e6b4da5cb ("rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops") + + == Regression Potential == + Low. Limited to powerpc. Fixes a current regression. + + == Test Case == + A test kernel was built with these patches and tested by the original bug reporter. + The bug reporter states the test kernel resolved the bug. + + == Comment: #0 - PAVAMAN SUBRAMANIYAM - 2018-05-23 01:15:30 == Install a P9 Open Power Hardware with the latest OP920 Firmware images provided in the following link: http://pfd.austin.ibm.com/releasenotes/openpower9/OP920/OP920_1808A/OP920_1808N_RelNote_Main.html root@witherspoon:~# cat /etc/os-release ID="openbmc-phosphor" NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro)" VERSION="ibm-v2.1" VERSION_ID="ibm-v2.1-438-g0030304-r12-0-g5ee4fb0" PRETTY_NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro) ibm-v2.1" BUILD_ID="ibm-v2.1-438-g0030304-r12" root@witherspoon:~# cat /var/lib/phosphor-software-manager/pnor/ro/VERSION IBM-witherspoon-ibm-OP9-v2.0-2.14 - op-build-v2.0-11-gb248194-dirty - buildroot-2018.02.1-6-ga8d1126 - skiboot-v6.0.1 - hostboot-8ab6717d-pfc036fa - occ-77bb5e6 - linux-4.16.8-openpower2-pb532d68 - petitboot-v1.7.1-p1188545 - machine-xml-7cd20a6 - hostboot-binaries-276bb70 - capp-ucode-p9-dd2-v4 - sbe-a596975 - hcode-b8173e8 + op-build-v2.0-11-gb248194-dirty + buildroot-2018.02.1-6-ga8d1126 + skiboot-v6.0.1 + hostboot-8ab6717d-pfc036fa + occ-77bb5e6 + linux-4.16.8-openpower2-pb532d68 + petitboot-v1.7.1-p1188545 + machine-xml-7cd20a6 + hostboot-binaries-276bb70 + capp-ucode-p9-dd2-v4 + sbe-a596975 + hcode-b8173e8 Seeing the following messages in the dmesg logs. [ 16.377405] ipmi_si: Unable to find any System Interface(s) [ 17.384118] nf_conntrack version 0.5.0 (65536 buckets, 262144 max) [ 1372.711730] INFO: rcu_sched self-detected stall on CPU [ 1372.711787] 32-: (5249 ticks this GP) idle=182/141/0 softirq=1093/1093 fqs=2623 [ 1372.711863] (t=5250 jiffies g=22430 c=22429 q=953) [ 1372.711921] Task dump for CPU 32: [ 1372.711922] kworker/32:1R running task0 1123 2 0x0804 [ 1372.711930] Workqueue: events rtc_timer_do_work [ 1372.711931] Call Trace: [ 1372.711934] [c03fd2b97350] [c014a8f8] sched_show_task.part.16+0xd8/0x110 (unreliable) [ 1372.711939] [c03fd2b973c0] [c01aa8bc] rcu_dump_cpu_stacks+0xd4/0x138 [ 1372.711942] [c03fd2b97410] [c01a9988] rcu_check_callbacks+0x8e8/0xb40 [ 1372.711945] [c03fd2b97540] [c01b7c28] update_process_times+0x48/0x90 [ 1372.711948] [c03fd2b97570] [c01cf974] tick_sched_handle.isra.5+0x34/0xd0 [ 1372.711950] [c03fd2b975a0] [c01cfa70] tick_sched_timer+0x60/0xe0 [ 1372.711953] [c03fd2b975e0] [c01b87d4] __hrtimer_run_queues+0x144/0x370 [ 1372.711956] [c03fd2b97660] [c01b972c] hrtimer_interrupt+0xfc/0x350 [ 1372.711959] [c03fd2b97730] [c00249f0] __timer_interrupt+0x90/0x260 [ 1372.711962] [c03fd2b97780] [c0024e08] timer_interrupt+0x98/0xe0 [ 1372.711965] [c03fd2b977b0] [c0009054] decrementer_common+0x114/0x120 [ 1372.711970] --- interrupt: 901 at opal_get_rtc_time+0x98/0x110 -LR = opal_return+0x14/0x48 + LR = opal_return+0x14/0x48 [ 1372.711972] [c03fd2b97aa0] [c0a457b8] opal_get_rtc_time+0x98/0x110 (unreliable) [ 1372.711975] [c03fd2b97ae0] [c0a3f98c] __rtc_read_time+0x7c/0x180 [ 1372.711977] [c03fd2b97b60] [c0a41738] rtc_timer_do_work+0x78/0x250 [ 1372.711980] [c03fd2b97c90] [c0134378] process_one_work+0x298/0x5a0 [ 1372.711982] [c03fd2b97d20] [c0134718] worker_thread+0x98/0x630 [ 1372.711985] [c03fd2b97dc0] [c013d348] kthread+0x1a8/0x1b0 [ 1372.711988] [c03fd2b97e30] [c000b658] ret_from_kernel_thread+0x5c/0x84 == Comment: #1 - PAVAMAN SUBRAMANIYAM - 2018-05-23 01:31:06 == - == Comment: #2 - Application Cdeadmin - 2018-05-23 01:33:40 == cde00 (cdead...@us.ibm.com) adde
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
** Changed in: ubuntu-power-systems Status: Triaged => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
I built a test kernel with commit 682e6b4da5cbe8e9a53f979a58c2a9d7dc997175. Commit 34dd25de9fe3f was also required as a prereq. The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1777857 Can you test this kernel and see if it resolves this bug? Note about installing test kernels: • If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages. • If the test kernel is 4.15(Bionic) or newer, you need to install the linux-modules, linux-modules-extra and linux-image-unsigned .deb packages. Thanks in advance! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
** Changed in: linux (Ubuntu) Status: New => Triaged ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Bionic) Status: New => Triaged ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => High ** Changed in: linux (Ubuntu Bionic) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu) Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu) Status: Triaged => In Progress ** Changed in: linux (Ubuntu Bionic) Status: Triaged => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
** Changed in: ubuntu-power-systems Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1777857] Re: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU
** Also affects: ubuntu-power-systems Importance: Undecided Status: New ** Changed in: ubuntu-power-systems Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team) ** Package changed: kernel-package (Ubuntu) => linux (Ubuntu) ** Changed in: ubuntu-power-systems Importance: Undecided => High ** Tags added: p9 triage-g -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1777857 Title: [LTCTest][OPAL][OP920] INFO: rcu_sched self-detected stall on CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1777857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs