** Description changed: + [IMPACT] + MCE test renders the system unresponsive on P9 open power hardware (Withersoon) + + [TEST] + A test kernel is available in ppa:ubuntu-power-triage/lp1848127. Please see the [OTHER] section for test details and comment #7 for results with the PPA kernel. + + [FIX] + IBM has identified the following patch that fixes this issue: + commit 99ead78afd1128bfcebe7f88f3b102fb2da09aee + Author: Balbir Singh <[email protected]> + Date: Tue Aug 20 13:43:47 2019 +0530 + + powerpc/mce: Fix MCE handling for huge pages + + [REGRESSION POTENTIAL] + The patch is applicable the powerpc architecture and limited in scope to MCE handling for huge pages. Patch does not touch any generic code. Regression if any is limited to powerpc MCE handling. + + [OTHER] == Comment: #0 - PAVAMAN SUBRAMANIYAM <[email protected]> - 2019-05-07 23:31:20 == Install a P9 Open Power Hardware with the latest OP930 Firmware images built from the upstream op-build git tree. root@witherspoon:~# cat /etc/os-release ID="openbmc-phosphor" NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro)" VERSION="ibm-v2.3" VERSION_ID="ibm-v2.3-476-g2d622cb-r32-0-g9973ab0" PRETTY_NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro) ibm-v2.3" BUILD_ID="ibm-v2.3-476-g2d622cb-r32" root@witherspoon:~# cat /var/lib/phosphor-software-manager/pnor/ro/VERSION - open-power-witherspoon-v2.3-rc2-58-g59fd0743 - buildroot-2019.02.2-17-g93b841d204 - skiboot-v6.3-rc2 - hostboot-19a436e - occ-58e422d - linux-5.0.9-openpower1-p3a4d5a4 - petitboot-v1.10.3 - machine-xml-a6f4df3 - hostboot-binaries-hw043019a.940 - capp-ucode-p9-dd2-v4 - sbe-249671d - hcode-hw040319a.940 + open-power-witherspoon-v2.3-rc2-58-g59fd0743 + buildroot-2019.02.2-17-g93b841d204 + skiboot-v6.3-rc2 + hostboot-19a436e + occ-58e422d + linux-5.0.9-openpower1-p3a4d5a4 + petitboot-v1.10.3 + machine-xml-a6f4df3 + hostboot-binaries-hw043019a.940 + capp-ucode-p9-dd2-v4 + sbe-249671d + hcode-hw040319a.940 Then enable sw xstop manually by using below command: root@ltc-wspoon11:~# nvram -p ibm,skiboot --update-config opal-sw-xstop=enable root@ltc-wspoon11:~# nvram -p ibm,skiboot --print-config "ibm,skiboot" Partition -------------------------- experimental-fast-reset=1 snarf-mode=noooooo opal-sw-xstop=enable Then from the Linux HOST injected the MCE UE Error on the machine as follows: root@ltc-wspoon11:~# ./probe_cpus.sh -L CHIP ID: 0 CORE ID: 0 THREADS: 4 CPUs: 0 1 2 3 CHIP ID: 0 CORE ID: 1 THREADS: 4 CPUs: 4 5 6 7 CHIP ID: 0 CORE ID: 2 THREADS: 4 CPUs: 8 9 10 11 CHIP ID: 0 CORE ID: 3 THREADS: 4 CPUs: 12 13 14 15 CHIP ID: 0 CORE ID: 6 THREADS: 4 CPUs: 16 17 18 19 CHIP ID: 0 CORE ID: 7 THREADS: 4 CPUs: 20 21 22 23 CHIP ID: 0 CORE ID: 8 THREADS: 4 CPUs: 24 25 26 27 CHIP ID: 0 CORE ID: 9 THREADS: 4 CPUs: 28 29 30 31 CHIP ID: 0 CORE ID: 10 THREADS: 4 CPUs: 32 33 34 35 CHIP ID: 0 CORE ID: 11 THREADS: 4 CPUs: 36 37 38 39 CHIP ID: 0 CORE ID: 12 THREADS: 4 CPUs: 40 41 42 43 CHIP ID: 0 CORE ID: 13 THREADS: 4 CPUs: 44 45 46 47 CHIP ID: 0 CORE ID: 16 THREADS: 4 CPUs: 48 49 50 51 CHIP ID: 0 CORE ID: 17 THREADS: 4 CPUs: 52 53 54 55 CHIP ID: 0 CORE ID: 18 THREADS: 4 CPUs: 56 57 58 59 CHIP ID: 0 CORE ID: 19 THREADS: 4 CPUs: 60 61 62 63 CHIP ID: 0 CORE ID: 20 THREADS: 4 CPUs: 64 65 66 67 CHIP ID: 0 CORE ID: 21 THREADS: 4 CPUs: 68 69 70 71 CHIP ID: 8 CORE ID: 6 THREADS: 4 CPUs: 72 73 74 75 CHIP ID: 8 CORE ID: 7 THREADS: 4 CPUs: 76 77 78 79 CHIP ID: 8 CORE ID: 8 THREADS: 4 CPUs: 80 81 82 83 CHIP ID: 8 CORE ID: 9 THREADS: 4 CPUs: 84 85 86 87 CHIP ID: 8 CORE ID: 10 THREADS: 4 CPUs: 88 89 90 91 CHIP ID: 8 CORE ID: 11 THREADS: 4 CPUs: 92 93 94 95 CHIP ID: 8 CORE ID: 12 THREADS: 4 CPUs: 96 97 98 99 CHIP ID: 8 CORE ID: 13 THREADS: 4 CPUs: 100 101 102 103 CHIP ID: 8 CORE ID: 14 THREADS: 4 CPUs: 104 105 106 107 CHIP ID: 8 CORE ID: 15 THREADS: 4 CPUs: 108 109 110 111 CHIP ID: 8 CORE ID: 16 THREADS: 4 CPUs: 112 113 114 115 CHIP ID: 8 CORE ID: 17 THREADS: 4 CPUs: 116 117 118 119 CHIP ID: 8 CORE ID: 18 THREADS: 4 CPUs: 120 121 122 123 CHIP ID: 8 CORE ID: 19 THREADS: 4 CPUs: 124 125 126 127 CHIP ID: 8 CORE ID: 20 THREADS: 4 CPUs: 128 129 130 131 CHIP ID: 8 CORE ID: 21 THREADS: 4 CPUs: 132 133 134 135 CHIP ID: 8 CORE ID: 22 THREADS: 4 CPUs: 136 137 138 139 CHIP ID: 8 CORE ID: 23 THREADS: 4 CPUs: 140 141 142 143 ----------------------------- p[0] - eq[0,1,2,3,4,5] - ex[0,1,3,4,5,6,8,9,10] - c[0,1,2,3,6,7,8,9,10,11,12,13,16,17,18,19,20,21] + eq[0,1,2,3,4,5] + ex[0,1,3,4,5,6,8,9,10] + c[0,1,2,3,6,7,8,9,10,11,12,13,16,17,18,19,20,21] p[8] - eq[1,2,3,4,5] - ex[3,4,5,6,7,8,9,10,11] - c[6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23] + eq[1,2,3,4,5] + ex[3,4,5,6,7,8,9,10,11] + c[6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23] ----------------------------- ----------Processor Layout------------------- p[0] - +---EQ00----+ +---EQ02----+ +---EQ04----+ - |EX-0 C0 | |EX-4 C8 | |EX-8 C16| - + - - - - - + + - - - - - + + - - - - - + - |EX-0 C1 | |EX-4 C9 | |EX-8 C17| - + - - - - - + + - - - - - + + - - - - - + - |EX-1 C2 | |EX-5 C10| |EX-9 C18| - + - - - - - + + - - - - - + + - - - - - + - |EX-1 C3 | |EX-5 C11| |EX-9 C19| - +-----------+ +-----------+ +-----------+ - - +---EQ01----+ +---EQ03----+ +---EQ05----+ - | | |EX-6 C12| |EX-10 C20| - + - - - - - + + - - - - - + + - - - - - + - | | |EX-6 C13| |EX-10 C21| - + - - - - - + + - - - - - + + - - - - - + - |EX-3 C6 | | | | | - + - - - - - + + - - - - - + + - - - - - + - |EX-3 C7 | | | | | - +-----------+ +-----------+ +-----------+ - + +---EQ00----+ +---EQ02----+ +---EQ04----+ + |EX-0 C0 | |EX-4 C8 | |EX-8 C16| + + - - - - - + + - - - - - + + - - - - - + + |EX-0 C1 | |EX-4 C9 | |EX-8 C17| + + - - - - - + + - - - - - + + - - - - - + + |EX-1 C2 | |EX-5 C10| |EX-9 C18| + + - - - - - + + - - - - - + + - - - - - + + |EX-1 C3 | |EX-5 C11| |EX-9 C19| + +-----------+ +-----------+ +-----------+ + + +---EQ01----+ +---EQ03----+ +---EQ05----+ + | | |EX-6 C12| |EX-10 C20| + + - - - - - + + - - - - - + + - - - - - + + | | |EX-6 C13| |EX-10 C21| + + - - - - - + + - - - - - + + - - - - - + + |EX-3 C6 | | | | | + + - - - - - + + - - - - - + + - - - - - + + |EX-3 C7 | | | | | + +-----------+ +-----------+ +-----------+ p[8] - +---EQ00----+ +---EQ02----+ +---EQ04----+ - | | |EX-4 C8 | |EX-8 C16| - + - - - - - + + - - - - - + + - - - - - + - | | |EX-4 C9 | |EX-8 C17| - + - - - - - + + - - - - - + + - - - - - + - | | |EX-5 C10| |EX-9 C18| - + - - - - - + + - - - - - + + - - - - - + - | | |EX-5 C11| |EX-9 C19| - +-----------+ +-----------+ +-----------+ - - +---EQ01----+ +---EQ03----+ +---EQ05----+ - | | |EX-6 C12| |EX-10 C20| - + - - - - - + + - - - - - + + - - - - - + - | | |EX-6 C13| |EX-10 C21| - + - - - - - + + - - - - - + + - - - - - + - |EX-3 C6 | |EX-7 C14| |EX-11 C22| - + - - - - - + + - - - - - + + - - - - - + - |EX-3 C7 | |EX-7 C15| |EX-11 C23| - +-----------+ +-----------+ +-----------+ + +---EQ00----+ +---EQ02----+ +---EQ04----+ + | | |EX-4 C8 | |EX-8 C16| + + - - - - - + + - - - - - + + - - - - - + + | | |EX-4 C9 | |EX-8 C17| + + - - - - - + + - - - - - + + - - - - - + + | | |EX-5 C10| |EX-9 C18| + + - - - - - + + - - - - - + + - - - - - + + | | |EX-5 C11| |EX-9 C19| + +-----------+ +-----------+ +-----------+ + + +---EQ01----+ +---EQ03----+ +---EQ05----+ + | | |EX-6 C12| |EX-10 C20| + + - - - - - + + - - - - - + + - - - - - + + | | |EX-6 C13| |EX-10 C21| + + - - - - - + + - - - - - + + - - - - - + + |EX-3 C6 | |EX-7 C14| |EX-11 C22| + + - - - - - + + - - - - - + + - - - - - + + |EX-3 C7 | |EX-7 C15| |EX-11 C23| + +-----------+ +-----------+ +-----------+ root@ltc-wspoon11:~# ./statedisable.sh ./statedisable.sh: line 10: /sys/devices/system/cpu/cpu*/cpuidle/state7/disable: No such file or directory ./statedisable.sh: line 11: /sys/devices/system/cpu/cpu*/cpuidle/state8/disable: No such file or directory root@ltc-wspoon11:~# cpupower idle-info CPUidle driver: powernv_idle CPUidle governor: menu analyzing CPU 0: Number of idle states: 7 Available idle states: snooze stop0_lite stop0 stop1 stop2 stop4 stop5 snooze (DISABLED) : Flags/Description: snooze Latency: 0 Usage: 81861 Duration: 29748269 stop0_lite (DISABLED) : Flags/Description: stop0_lite Latency: 1 Usage: 70 Duration: 1982345 stop0 (DISABLED) : Flags/Description: stop0 Latency: 2 Usage: 274 Duration: 125896 stop1 (DISABLED) : Flags/Description: stop1 Latency: 5 Usage: 36 Duration: 4922 stop2 (DISABLED) : Flags/Description: stop2 Latency: 10 Usage: 3745 Duration: 88300041 stop4 (DISABLED) : Flags/Description: stop4 Latency: 100 Usage: 65 Duration: 1048951 stop5 (DISABLED) : Flags/Description: stop5 Latency: 200 Usage: 30377 Duration: 61977191643 root@ltc-wspoon11:~#./run_workload.sh root@ltc-wspoon11:~# ./scom_addr_p9.sh 0x1001080c 15 EQ[ 3]: 0x1301080c EX[ 7]: 0x13010c0c - C[15]: 0x3f01080c + C[15]: 0x3f01080c root@ltc-wspoon11:~# ./skiboot/external/xscom-utils/getscom -c 0x8 0x13010c0c 0000000000000000 root@ltc-wspoon11:~# ./skiboot/external/xscom-utils/putscom -c 0x8 0x13010c0c 0c00000000000000 0c00000000000000 root@ltc-wspoon11:~# ./skiboot/external/xscom-utils/putscom -c 0x8 0x13010c0c 0c00000000000000 0c00000000000000 After injecting the Machine check error, the HOST Linux stops pinging and the console access to the machine also gets lost. But still the Open BMC shell and GUI still shows that the HOST is in Running state. == Comment: #1 - PAVAMAN SUBRAMANIYAM <[email protected]> - 2019-05-07 23:33:31 == The machine is installed with the Ubuntu 18.04 Linux OS. root@ltc-wspoon11:~# uname -a Linux ltc-wspoon11 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:26:19 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux root@ltc-wspoon11:~# cat /etc/os-release NAME="Ubuntu" VERSION="18.04.2 LTS (Bionic Beaver)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 18.04.2 LTS" VERSION_ID="18.04" 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"; VERSION_CODENAME=bionic UBUNTU_CODENAME=bionic root@ltc-wspoon11:~# cat /proc/cpuinfo | tail cpu : POWER9, altivec supported clock : 2300.000000MHz revision : 2.3 (pvr 004e 1203) timebase : 512000000 platform : PowerNV model : 8335-GTH machine : PowerNV 8335-GTH firmware : OPAL MMU : Radix root@ltc-wspoon11:~# lsmcode Version of System Firmware : - Product Name : OpenPOWER Firmware - Product Version : witherspoon-v2.3-rc2-58-g59fd0743 - Product Extra : skiboot-v6.3-rc2 - Product Extra : bmc-firmware-version-2.03 - Product Extra : occ-58e422d - Product Extra : hostboot-19a436e - Product Extra : buildroot-2019.02.2-17-g93b841d204 - Product Extra : capp-ucode-p9-dd2-v4 - Product Extra : machine-xml-a6f4df3 - Product Extra : hostboot-binaries-hw043019a.940 - Product Extra : sbe-249671d - Product Extra : hcode-hw040319a.940 - Product Extra : petitboot-v1.10.3 - Product Extra : linux-5.0.9-openpower1-p3a4d5a4 + Product Name : OpenPOWER Firmware + Product Version : witherspoon-v2.3-rc2-58-g59fd0743 + Product Extra : skiboot-v6.3-rc2 + Product Extra : bmc-firmware-version-2.03 + Product Extra : occ-58e422d + Product Extra : hostboot-19a436e + Product Extra : buildroot-2019.02.2-17-g93b841d204 + Product Extra : capp-ucode-p9-dd2-v4 + Product Extra : machine-xml-a6f4df3 + Product Extra : hostboot-binaries-hw043019a.940 + Product Extra : sbe-249671d + Product Extra : hcode-hw040319a.940 + Product Extra : petitboot-v1.10.3 + Product Extra : linux-5.0.9-openpower1-p3a4d5a4 == Comment: #3 - PAVAMAN SUBRAMANIYAM <[email protected]> - 2019-05-07 23:42:35 == - - I quickly tested MCE on op930 build ( IBM-witherspoon-ibm-OP9-v2.2-3.5) with 4.15.0-47-generic and found no hang. But on further investigation I see that the hang issue is seen from kernel version 4.15.0-48-generic and above. Looks like changes that gone in 4.15.0-48-generic version causing the hang issue. Still investigating.... + I quickly tested MCE on op930 build ( IBM-witherspoon-ibm-OP9-v2.2-3.5) + with 4.15.0-47-generic and found no hang. But on further investigation + I see that the hang issue is seen from kernel version 4.15.0-48-generic + and above. Looks like changes that gone in 4.15.0-48-generic version + causing the hang issue. Still investigating.... == Comment: #9 - Application Cdeadmin <[email protected]> - 2019-05-22 06:45:07 == ==== State: Working by: jayeshp on 22 May 2019 06:37:27 ==== Any update? == Comment: #11 - MAHESH J. SALGAONKAR <[email protected]> - 2019-09-19 04:44:01 == The hang issues should go away with below patch. commit 99ead78afd1128bfcebe7f88f3b102fb2da09aee Author: Balbir Singh <[email protected]> Date: Tue Aug 20 13:43:47 2019 +0530 - powerpc/mce: Fix MCE handling for huge pages - - The current code would fail on huge pages addresses, since the shift would - be incorrect. Use the correct page shift value returned by - __find_linux_pte() to get the correct physical address. The code is more - generic and can handle both regular and compound pages. - - Fixes: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors") - Signed-off-by: Balbir Singh <[email protected]> - [[email protected]: Fixup pseries_do_memory_failure()] - Signed-off-by: Reza Arbab <[email protected]> - Tested-by: Mahesh Salgaonkar <[email protected]> - Signed-off-by: Santosh Sivaraj <[email protected]> - Cc: [email protected] # v4.15+ - Signed-off-by: Michael Ellerman <[email protected]> - Link: https://lore.kernel.org/r/[email protected] + powerpc/mce: Fix MCE handling for huge pages + + The current code would fail on huge pages addresses, since the shift would + be incorrect. Use the correct page shift value returned by + __find_linux_pte() to get the correct physical address. The code is more + generic and can handle both regular and compound pages. + + Fixes: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors") + Signed-off-by: Balbir Singh <[email protected]> + [[email protected]: Fixup pseries_do_memory_failure()] + Signed-off-by: Reza Arbab <[email protected]> + Tested-by: Mahesh Salgaonkar <[email protected]> + Signed-off-by: Santosh Sivaraj <[email protected]> + Cc: [email protected] # v4.15+ + Signed-off-by: Michael Ellerman <[email protected]> + Link: https://lore.kernel.org/r/[email protected]
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848127 Title: [LTCTest][OPAL][OP930] Machine hangs after injecting the Machine Check Error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1848127/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
