--- Comment From hbath...@in.ibm.com 2019-08-23 07:42 EDT---
The issue is not seen anymore with 4.15.0-59.66~16.04.1
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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This bug is awaiting verification that the kernel in -proposed solves
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xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag
** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin18042
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Title:
System crashes on hot adding a core with
** Changed in: ubuntu-power-systems
Status: Fix Committed => Fix Released
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Title:
System crashes on hot adding a core with
** Tags added: cscc
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Title:
System crashes on hot adding a core with drmgr command
(4.15.0-48-generic)
Status in The
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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Title:
System crashes on hot adding a core with drmgr
This bug was fixed in the package linux - 4.15.0-55.60
---
linux (4.15.0-55.60) bionic; urgency=medium
* linux: 4.15.0-55.60 -proposed tracker (LP: #1834954)
* Request backport of ceph commits into bionic (LP: #1834235)
- ceph: use atomic_t for ceph_inode_info::i_shared_gen
ubuntu@P8lpar4:~$ uname -a
Linux P8lpar4 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:21:40 UTC 2019
ppc64le ppc64le ppc64le GNU/Linux
ubuntu@P8lpar4:~$
ubuntu@P8lpar4:~$ apt policy linux-image-generic
linux-image-generic:
Installed: 4.15.0.55.57
Candidate: 4.15.0.55.57
Version table:
** Changed in: ubuntu-power-systems
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Manoj Iyer (manjo)
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** Changed in: linux (Ubuntu Bionic)
Status: New => Fix Committed
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Title:
System crashes on hot adding a core with drmgr
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
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The issue does not reproduce on Disco.
root@P8lpar4:/home/ubuntu# uname -a
Linux P8lpar4 5.0.0-19-generic #20-Ubuntu SMP Wed Jun 19 21:50:53 UTC 2019
ppc64le ppc64le ppc64le GNU/Linux
root@P8lpar4:/home/ubuntu#
root@P8lpar4:/home/ubuntu# drmgr -c cpu -r -q 1
Validating CPU DLPAR
** Changed in: ubuntu-power-systems
Importance: High => Critical
** Changed in: linux (Ubuntu)
Importance: High => Critical
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SRU submitted: https://lists.ubuntu.com/archives/kernel-
team/2019-June/101539.html
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Title:
System crashes on hot adding a core
== Bionic GA 4.15.0 kernel ==
ubuntu@P8lpar4:~$ sudo su
root@P8lpar4:/home/ubuntu# drmgr -c cpu -r -q 1
Validating CPU DLPAR capability...yes.
CPU 121
root@P8lpar4:/home/ubuntu# drmgr -c cpu -a -q 1
[262984.440091] BUG: arch topology borken
[262984.440110]
** Description changed:
+ [Impact]
+ On Bionic GA kernel (4.15.0), hot add of cpu with drmgr causes the kernel to
crash.
+
+ [Test]
+ # drmgr -c cpu -r -q 1
+ # drmgr -c cpu -a -q 1
+
+ [Fix]
+ 558f86493df0 powerpc/numa: document topology_updates_enabled, disable by
default
+
+ 2d4d9b308f8f
** Changed in: ubuntu-power-systems
Status: New => In Progress
** Changed in: linux (Ubuntu)
Status: New => In Progress
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** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Canonical Kernel Team (canonical-kernel-team)
** Changed in: ubuntu-power-systems
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
** Changed in: linux
** Package changed: kernel-package (Ubuntu) => linux (Ubuntu)
** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
** Tags added: powervm
** Changed in: ubuntu-power-systems
Importance: Undecided => High
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