Also,
it has passed with all arches including zVM / LPAR on Focal 5.4.0-44.48 as well.
On Focal kernel config:
# CONFIG_RT_GROUP_SCHED is not set
Commit from Seth:
b7ac4514cc56ec
UBUNTU: [Config] Turn off CONFIG_RT_GROUP_SCHED everywhere
I think we can close this bug now.
Thanks
** Changed in:
Hello Thadeu,
ubuntu_qrt_apparmor test has passed on B-GCP-5.4 (5.4.0-1021.21~18.04.1)
and F-GCP 5.4.0-1016.16
Thanks.
Sam
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Title:
So, B-GCP-5.4 as well as F-GCP 5.4.0-1011 have RT_GROUP_SCHED on, and
that has been turned off by later versions, like F-GCP 5.4.0-1012 and
B-GCP-5.4 5.4.0-1016.
@cypressyew, can you confirm that it doesn't happen on such kernels?
Thanks.
Cascardo.
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This issue can be found on B-GCP-5.4
5.4.0-1011.11~18.04.1
** Tags added: kqa
** Tags removed: kqa sru-20200427
** Tags added: kqa-blocker
** Tags added: sru-20200518
** Summary changed:
- test_regression_testsuite from ubuntu_qrt_apparmor failed on Focal zVM
+ test_regression_testsuite from
** Tags added: 5.4
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Title:
test_regression_testsuite from ubuntu_qrt_apparmor failed on Focal zVM
Status in QA Regression Testing:
This feels related to
https://bugs.launchpad.net/ubuntu/+source/rtkit/+bug/1875665 which was
filed by amd64 users.
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Title:
All that about CONFIG_RT_GROUP_SCHED seems sensible, but then I am
confused as to why is it only showing up in s390x environments?
The test is trying to exercise CAP_SYS_NICE, and doing so by calling
setpriority(PRIO_PROCESS, 0, -5)
Does the test needs to be put into a cgroup with rt
Reading about SCHED_RR, we had some reports in focal which were about
issues setting real-time priority to processes and that appeared to be
caused by enabling CONFIG_RT_GROUP_SCHED (which was a request by
docker). That happened before release and after 5.4.0-21 (see bug
#1873315). And Thadeu's
This issue can be found on older Focal kernels as well (since
5.4.0-24.28, first failure found on zVM, however zKVM passed and LPAR
was not tested)
With this kernel 5.4.0-29.33, it can be found on LPAR as well (zKVM not tested)
But not with other kernels.
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My guess is that the test might be hitting the following code from
kernel/sched/core.c:
#ifdef CONFIG_RT_GROUP_SCHED
/*
* Do not allow realtime tasks into groups that have no runtime
* assigned.
*/
if
I have seen a similar failure with that specific test when running the
tests under virtualbox on x86, though I have not tried it in several
years.
If this is the expected behavior going forward on s390s, we can address
it in qa-regression-testing.
Thanks.
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qrt test suite passed on ARM64 / AMD64 / PowerPC (P8) with this kernel.
P9 was not tested yet as well.
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Title:
The qrt test suite was not tested on other s390x instances yet (LPAR /
zKVM)
** Tags added: s390x sru-20200427 ubuntu-qrt-apparmor
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