Public bug reported:
---Problem Description---
Unable to take a dump using kdump on host, service is enabled and correctly
configured.
"[ 6.110044] Kernel panic - not syncing: System is deadlocked on memory
---uname output---
Linux ilzlnx3.tuc.stglabs.ibm.com 5.4.0-81-generic #91-Ubuntu SMP Thu Jul 15
19:07:49 UTC 2021 s390x s390x s390x GNU/Linux
Machine Type = S/390
---System Hang---
Once the kdump is unsuccessful, I have to load it from the HMC.
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Trigger kdump with a crash by:
sysctl -w kernel.sysrq=1
echo c > /proc/sysrq-trigger
*Additional Instructions for vanessa.ba...@ibm.com , finne...@us.ibm.com:
-Post a private note with access information to the machine that the bug is
occuring on.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-194306 severity-high
targetmilestone-inin20044
** Tags added: architecture-s39064 bugnameltc-194306 severity-high
targetmilestone-inin20044
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https://bugs.launchpad.net/bugs/1946463
Title:
Ubuntu20.04.3 default crashkernel size insufficient for kdump
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