| 2020-07-21 03:23:36 |
Po-Hsu Lin |
bug |
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|
added bug |
| 2020-07-21 03:23:59 |
Po-Hsu Lin |
tags |
|
5.3 eoan kqa-blocker ppc64el sru-20200629 ubuntu-kernel-selftests |
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| 2020-07-21 05:12:36 |
Po-Hsu Lin |
bug task added |
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linux (Ubuntu) |
|
| 2020-07-21 05:12:55 |
Po-Hsu Lin |
nominated for series |
|
Ubuntu Eoan |
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| 2020-07-21 05:12:55 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu Eoan) |
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| 2020-07-21 05:13:25 |
Po-Hsu Lin |
summary |
dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on E |
[Potential Regression] dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on E |
|
| 2020-07-21 05:30:07 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2020-07-21 05:30:09 |
Ubuntu Kernel Bot |
linux (Ubuntu Eoan): status |
New |
Incomplete |
|
| 2020-08-21 08:36:14 |
Po-Hsu Lin |
summary |
[Potential Regression] dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on E |
[Potential Regression] dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on E/F |
|
| 2020-08-21 08:36:27 |
Po-Hsu Lin |
tags |
5.3 eoan kqa-blocker ppc64el sru-20200629 ubuntu-kernel-selftests |
5.3 5.4 eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests |
|
| 2020-08-25 05:07:02 |
Po-Hsu Lin |
summary |
[Potential Regression] dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on E/F |
[Potential Regression] dscr_inherit_exec_test from powerpc in ubuntu_kernel_selftests failed on B/E/F |
|
| 2020-08-25 05:07:08 |
Po-Hsu Lin |
tags |
5.3 5.4 eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests |
|
| 2020-08-25 05:07:11 |
Po-Hsu Lin |
tags |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests xenial |
|
| 2020-08-25 19:28:35 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Eoan): status |
Incomplete |
Confirmed |
|
| 2020-08-25 19:28:39 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Eoan): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2020-08-25 19:39:57 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Eoan): status |
Confirmed |
Won't Fix |
|
| 2020-08-25 20:50:21 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
ubuntu-kernel-tests/trunk |
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| 2020-08-25 20:50:21 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
ubuntu-kernel-tests/trunk |
|
| 2020-08-25 20:50:44 |
Thadeu Lima de Souza Cascardo |
bug task deleted |
ubuntu-kernel-tests |
|
|
| 2020-08-25 20:50:52 |
Thadeu Lima de Souza Cascardo |
bug task deleted |
ubuntu-kernel-tests/trunk |
|
|
| 2020-08-25 20:51:02 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Bionic |
|
| 2020-08-25 20:51:02 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2020-08-25 20:51:02 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Focal |
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| 2020-08-25 20:51:02 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux (Ubuntu Focal) |
|
| 2020-08-25 20:51:12 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Focal): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2020-08-25 20:51:14 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Bionic): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2020-08-25 20:51:19 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Focal): status |
New |
In Progress |
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| 2020-08-25 20:51:24 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Bionic): status |
New |
Triaged |
|
| 2020-08-25 20:59:35 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu): status |
Incomplete |
Invalid |
|
| 2020-08-25 21:25:17 |
Thadeu Lima de Souza Cascardo |
description |
Issue found on 5.3.0-64.58 with P8 node modoc (passed with P9 node)
# selftests: powerpc/dscr: dscr_inherit_exec_test
# test: dscr_inherit_exec_test
# tags: git_version:unknown
# Parent DSCR 1 was not inherited over exec (kernel value)
# Child didn't exit cleanly
# failure: dscr_inherit_exec_test
not ok 5 selftests: powerpc/dscr: dscr_inherit_exec_test # exit=1 |
[Impact]
Code that touches DSCR user MSR does not set dscr_inherit, which breaks DSCR restore doing context switches and inheritance when forking. DSCR is used to control cache hinting. This is caused by lack of kernel interrupt when the DSCR user MSR is written, which is controlled by FSCR which would otherwise cause a facility unavailable interrupt.
[Test case]
apt-get source linux
cd linux-5.4.0/tools/testing/tools/selftests/powerpc/
make -j 32
make -C dscr run_tests
make -C ptrace run_tests
make -C tm run_tests
Look up for "not ok" versus "ok", specially for dscr_inherit_exec_test, ptrace-tar and tm-resched-tar.
[Potential regression]
Manipulating DSCR might break on different machines (with DTs containing
/cpus/ibm,powerpc-cpu-features, for example). Code that does so might crash because the facility unavailable interrupt handling might be not working correctly.
====================================
Issue found on 5.3.0-64.58 with P8 node modoc (passed with P9 node)
# selftests: powerpc/dscr: dscr_inherit_exec_test
# test: dscr_inherit_exec_test
# tags: git_version:unknown
# Parent DSCR 1 was not inherited over exec (kernel value)
# Child didn't exit cleanly
# failure: dscr_inherit_exec_test
not ok 5 selftests: powerpc/dscr: dscr_inherit_exec_test # exit=1 |
|
| 2020-08-26 01:19:17 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Bionic): status |
Triaged |
In Progress |
|
| 2020-08-26 13:15:28 |
Stefan Bader |
linux (Ubuntu Focal): status |
In Progress |
Fix Committed |
|
| 2020-08-26 13:15:34 |
Stefan Bader |
linux (Ubuntu Focal): importance |
Undecided |
High |
|
| 2020-08-26 13:15:38 |
Stefan Bader |
linux (Ubuntu Focal): importance |
High |
Medium |
|
| 2020-08-26 13:15:43 |
Stefan Bader |
linux (Ubuntu Bionic): importance |
Undecided |
Medium |
|
| 2020-08-26 14:00:36 |
Stefan Bader |
linux (Ubuntu Bionic): status |
In Progress |
Fix Committed |
|
| 2020-08-27 12:08:12 |
Ubuntu Kernel Bot |
tags |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests xenial |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests verification-needed-focal xenial |
|
| 2020-08-27 12:37:27 |
Ubuntu Kernel Bot |
tags |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests verification-needed-focal xenial |
4.15 5.3 5.4 bionic eoan focal kqa-blocker ppc64el sru-20200629 sru-20200810 ubuntu-kernel-selftests verification-needed-bionic verification-needed-focal xenial |
|
| 2020-08-31 13:57:07 |
Launchpad Janitor |
linux (Ubuntu Focal): status |
Fix Committed |
Fix Released |
|
| 2020-09-01 10:15:06 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
