Also seen in linux-azure 5.8.0-1027.29 (and later) for groovy
** Also affects: linux-azure (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-azure-4.15 (Ubuntu Groovy)
Importance: Undecided
Status: New
** Tags added: 5.8 groovy
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-azure in Ubuntu.
https://bugs.launchpad.net/bugs/1923114
Title:
ubuntu_kernel_selftests: ./cpu-on-off-test.sh: line 94: echo: write
error: Device or resource busy
Status in ubuntu-kernel-tests:
New
Status in linux-azure package in Ubuntu:
New
Status in linux-azure-4.15 package in Ubuntu:
New
Status in linux-azure source package in Trusty:
New
Status in linux-azure-4.15 source package in Trusty:
New
Status in linux-azure source package in Xenial:
New
Status in linux-azure-4.15 source package in Xenial:
New
Status in linux-azure source package in Bionic:
New
Status in linux-azure-4.15 source package in Bionic:
New
Status in linux-azure source package in Groovy:
New
Status in linux-azure-4.15 source package in Groovy:
New
Bug description:
Test cpu-hotplug from ubuntu_kernel_selftests failed with bionic
:linux-azure-4.15 running on a Basic A2 with 2 cores (besides other
instance types):
selftests: cpu-on-off-test.sh
========================================
pid 28041's current affinity mask: 3
pid 28041's new affinity mask: 1
CPU online/offline summary:
present_cpus = 0-1 present_max = 1
Cpus in online state: 0-1
Cpus in offline state: 0
Limited scope test: one hotplug cpu
(leaves cpu in the original state):
online to offline to online: cpu 1
not ok 1..1 selftests: cpu-on-off-test.sh [FAIL]
./cpu-on-off-test.sh: line 94: echo: write error: Device or resource busy
offline_cpu_expect_success 1: unexpected fail
http://10.246.72.46/4.15.0-1112.124~16.04.1-azure/xenial-linux-azure-
azure-
amd64-4.15.0-Basic_A2-ubuntu_kernel_selftests/ubuntu_kernel_selftests/results/ubuntu_kernel_selftests
.cpu-hotplug/debug/ubuntu_kernel_selftests.cpu-hotplug.DEBUG.html
The problem happens at "autotest-client-tests/ubuntu_kernel_selftests
/cpu-on-off-test.sh" when executing:
echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
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