** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => Massimiliano Pellizzer (mpellizzer)
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https://bugs.launchpad.net/bugs/2075575
Title:
kexec fails in LPAR when some cpus are disabled
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Jammy:
Triaged
Status in linux source package in Noble:
Fix Released
Status in linux source package in Oracular:
Fix Released
Bug description:
== Comment: #0 - SEETEENA THOUFEEK <[email protected]> - 2024-08-02
03:11:31 ==
+++ This bug was initially created as a clone of Bug #206083 +++
---Problem Description---
kexec fails in LPAR when some cpus are disabled
Contact Information = [email protected]
Machine Type = na
---uname output---
na
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Summary:
At L1 level, kexec fails if some of the cpus in the machine are disabled.
Distros and kernel versions used:
1. Distro versions used
a. L1 LPAR :
b. L2 :
Repro steps:
1. Boot into an L1 lpar
2. Disable some cpus (eg: ppc64_cpu --cores-on=3)
3. Try to kexec.
This bug is reproducible only when we load the target kernel/initrd and use
"kexec -e" as follows:
kexec -l --initrd initramfs-$(uname -r).img vmlinuz-$(uname -r)
--append="$(cat /proc/cmdline)"
kexec -e
kexec works fine if we do a normal kexec without skipping the shutdown path
kexec --initrd initramfs-$(uname -r).img vmlinuz-$(uname -r)
--append="$(cat /proc/cmdline)"
Fix is upstream now:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=21a741eb75f80397e5f7d3739e24d7d75e619011
Thanks,
Sourabh Jain
please include in Ubuntu
Oops output:
no
Stack trace output:
no
System Dump Info:
The system is not configured to capture a system dump.
*Additional Instructions for [email protected]:
-Attach sysctl -a output output to the bug.
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