** Changed in: ubuntu-z-systems
Status: New => In Progress
** Tags added: s390x
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https://bugs.launchpad.net/bugs/2013603
Title:
Kernel livepatch ftrace graph fix
Status in Ubuntu on IBM z Systems:
In Progress
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Jammy:
In Progress
Bug description:
[Impact]
* Additional patch required to support Livepatch for s390x
* Fixes Livepatch transition issues when using ftrace graph tracing
[Test Case]
* Compile test
* Boot test
* Test a Livepatch (patch to /proc/meminfo module)
* Test Livepatch from ftrace graphed function (via
https://github.com/SUSE/qa_test_klp/, klp_tc_10.sh)
[Where things could go wrong]
* Functionality already exists upstream, once kernel is boot and Livepatch
tested - should have no regressions
[Other info]
* Additional required patch was identified
(https://github.com/dynup/kpatch/commit/324a43714b1227b5688e22966a5ee4414c8861d1)
due to ftrace graph livepatch transition issue
(https://github.com/SUSE/qa_test_klp/issues/17).
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