Ubuntu18.10:ppc64:s390x - Sysrq trigger disabled when writing to /proc/sysrq-trigger
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
The Ubuntu-power-systems project |
Invalid
|
Medium
|
Canonical Kernel Team | ||
linux (Ubuntu) |
Invalid
|
Medium
|
Ubuntu on IBM Power Systems Bug Triage | ||
Cosmic |
Invalid
|
Medium
|
Ubuntu on IBM Power Systems Bug Triage | ||
systemd (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Cosmic |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
== Comment: #0 - Praveen K. Pandey <email address hidden> - 2018-09-19 04:49:39 ==
---Problem Description---
[Witherspoon-
while testing kdump trying trigger kdump panic via /proc/sysrq-trigger it failed as : SysRq : This sysrq operation is disabled
LOG:
root@test:~# cat /proc/sys/
176
root@test:~# echo c > /proc/sysrq-trigger
root@test:~# dmesg
[ 380.340051] mlx5_core 0000:01:00.1 enp1s0f1: Self test out: status flags(0x2)
[ 389.404239] sysrq: SysRq : This sysrq operation is disabled.
root@test~# cat /boot/config-
CONFIG_
CONFIG_
CONFIG_
root@test:~# cat /etc/sysctl.conf | grep kernel.sysrq
#kernel.sysrq=438
root@test:~# kdump-config show
DUMP_MODE: kdump
USE_KDUMP: 1
KDUMP_SYSCTL: kernel.
KDUMP_COREDIR: /var/crash
crashkernel addr:
/var/
kdump initrd:
/var/
current state: ready to kdump
kexec command:
/sbin/kexec -p --command-
root@test:~#
Regards
Praveen
== Comment: #2 - Praveen K. Pandey <email address hidden> - 2018-09-19 05:16:11 ==
when i enable in /etc/sysctl.conf it works . i append below value in sysctl.conf
echo "kernel.sysrq = 1" >> /etc/sysctl.conf
I think this is should be enable by default in ubuntu 18.10 as earlier ubuntu distro it has , not sure why it got removed as kdump mechanism require this .
Praveen
Regards
tags: | added: architecture-ppc64le bugnameltc-171577 severity-medium targetmilestone-inin1810 |
Changed in ubuntu: | |
assignee: | nobody → Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
affects: | ubuntu → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | New → Triaged |
importance: | Undecided → Medium |
tags: | added: kernel-da-key |
summary: |
- Ubuntu18.10:Witherspoon:DD2.2 - Sysrq trigger disabled when writing to + Ubuntu18.10:ppc64:s390x - Sysrq trigger disabled when writing to /proc/sysrq-trigger |
Changed in ubuntu-power-systems: | |
status: | Triaged → Invalid |
tags: |
added: targetmilestone-inin--- removed: targetmilestone-inin1810 |
Changed in systemd (Ubuntu): | |
status: | New → Invalid |
tags: |
added: targetmilestone-inin1810 removed: targetmilestone-inin--- |
This is not limited to ppc64el and at least applies to s390x, too.