SOS:Unplanned\abnormal restart. kernel: microcode: microcode updated

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baiyi
Posts: 1
Joined: 2018/10/11 08:18:11

SOS:Unplanned\abnormal restart. kernel: microcode: microcode updated

Post by baiyi » 2018/10/11 09:23:09

Describe :
CentOS Linux release 7.5.1804 (Core)
Server hardware is normal. Deploy the KVM virtualization environment, with about 10 virtual machines
The server was restarted abnormally. This restart was not planned.
Check the system log and find the following information.Is it a reboot caused by a microcode update?But why is microcode automatically updated?Do not understand, help, please help me, how to avoid the server restart again?

LOG:
Oct 10 17:30:01 [localhost] systemd: Started Session 794 of user root.
Oct 10 17:30:01 [localhost] systemd: Starting Session 794 of user root.
Oct 10 17:39:43 [localhost] journal: Runtime journal is using 8.0M (max allowed 3.1G, trying to leave 4.0G free of 31.3G available → current limit 3.1G).
Oct 10 17:39:43 [localhost] kernel: microcode: microcode updated early to revision 0xb00002e, date = 2018-04-19
Oct 10 17:39:43 [localhost] kernel: Initializing cgroup subsys cpuset
Oct 10 17:39:43 [localhost] kernel: Initializing cgroup subsys cpu
Oct 10 17:39:43 [localhost] kernel: Initializing cgroup subsys cpuacct
Oct 10 17:39:43 [localhost] kernel: Linux version 3.10.0-862.11.6.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC) ) #1 SMP Tue Aug 14 21:49
:04 UTC 2018
Oct 10 17:39:43 [localhost] kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-862.11.6.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap
rhgb quiet LANG=zh_CN.UTF-8
Oct 10 17:39:43 [localhost] kernel: e820: BIOS-provided physical RAM map:
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009bfff] usable
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000000009c000-0x000000000009ffff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x0000000000100000-0x000000007a288fff] usable
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007a289000-0x000000007af0afff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007af0b000-0x000000007b93afff] ACPI NVS
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007b93b000-0x000000007bab5fff] ACPI data
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007bab6000-0x000000007bae8fff] usable
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007bae9000-0x000000007bafefff] ACPI data
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007baff000-0x000000007bafffff] usable
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x000000007bb00000-0x000000008fffffff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x00000000feda8000-0x00000000fedabfff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x00000000ff310000-0x00000000ffffffff] reserved
Oct 10 17:39:43 [localhost] kernel: BIOS-e820: [mem 0x0000000100000000-0x000000107fffffff] usable
Oct 10 17:39:43 [localhost] kernel: NX (Execute Disable) protection: active
Oct 10 17:39:43 [localhost] kernel: SMBIOS 2.8 present.
Oct 10 17:39:43 [localhost] kernel: e820: last_pfn = 0x1080000 max_arch_pfn = 0x400000000
Oct 10 17:39:43 [localhost] kernel: PAT configuration [0-7]: WB WC UC- UC WB WP UC- UC
Oct 10 17:39:43 [localhost] kernel: e820: last_pfn = 0x7bb00 max_arch_pfn = 0x400000000
Oct 10 17:39:43 [localhost] kernel: Using GB pages for direct mapping
Oct 10 17:39:43 [localhost] kernel: RAMDISK: [mem 0x34223000-0x36109fff]
Oct 10 17:39:43 [localhost] kernel: Early table checksum verification disabled
Oct 10 17:39:43 [localhost] kernel: ACPI: RSDP 00000000000fe320 00024 (v02 DELL )
Oct 10 17:39:43 [localhost] kernel: ACPI: XSDT 000000007bab40e8 000BC (v01 DELL PE_SC3 00000000 01000013)
Oct 10 17:39:43 [localhost] kernel: ACPI: FACP 000000007bab0000 000F4 (v04 DELL PE_SC3 00000000 DELL 00000001)
Oct 10 17:39:43 [localhost] kernel: ACPI: DSDT 000000007ba98000 10777 (v02 DELL PE_SC3 00000003 DELL 00000001)
Oct 10 17:39:43 [localhost] kernel: ACPI: FACS 000000007b8f3000 00040
Oct 10 17:39:43 [localhost] kernel: ACPI: MCEJ 000000007bab3000 00130 (v01 INTEL 00000001 INTL 0100000D)
Oct 10 17:39:43 [localhost] kernel: ACPI: WD__ 000000007bab2000 00134 (v01 DELL PE_SC3 00000001 DELL 00000001)

hunter86_bg
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Re: SOS:Unplanned\abnormal restart. kernel: microcode: microcode updated

Post by hunter86_bg » 2018/10/11 17:13:30

Microcode update happens very early in the boot process, so it shouldn't be your root cause. Check the system's logs, especially '/var/log/messages'.
Also check if any kernel dump has been generated and if possible configure remote logging.

On HP hardware there is a mechanism called Automatic System Recovery that ,if enabled, can cause a reboot of the system that was unresponsive for some time.
Other vendors provide similar functionality.

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