ISO testers (level-1) VMs crash when running the test suite with Jessie's kernel

… but works fine when boooted with Wheezy’s kernel. In both cases, the system is running Jessie.

Symptoms: the system is unresponsible, including ping.

I can’t reproduce that bug (with nested virtualization as well) in another Jessie VM, that’s running on different hardware, but with a very similar setup. I can’t reproduce it on bare metal either.

More information I could gather:

[  152.976056] INFO: rcu_sched detected stalls on CPUs/tasks: { 0 2} (detected by 1, t=5254 jiffies, g=7943, c=7942, q=6728)
[  360.096135] INFO: task kworker/u6:0:6 blocked for more than 120 seconds.
[  360.097693]       Not tainted 3.16.0-4-amd64 #1
[  360.098687] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.100691] INFO: task jbd2/dm-0-8:139 blocked for more than 120 seconds.
[  360.102189]       Not tainted 3.16.0-4-amd64 #1
[  360.103178] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.105015] INFO: task jbd2/vdb-8:328 blocked for more than 120 seconds.
[  360.106475]       Not tainted 3.16.0-4-amd64 #1
[  360.107462] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.109328] INFO: task rs:main Q:Reg:700 blocked for more than 120 seconds.
[  360.110740]       Not tainted 3.16.0-4-amd64 #1
[  360.111654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.113449] INFO: task master:787 blocked for more than 120 seconds.
[  360.114731]       Not tainted 3.16.0-4-amd64 #1
[  360.115645] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.117405] INFO: task pickup:798 blocked for more than 120 seconds.
[  360.118682]       Not tainted 3.16.0-4-amd64 #1
[  360.119595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.121365] INFO: task cucumber:2205 blocked for more than 120 seconds.
[  360.122598]       Not tainted 3.16.0-4-amd64 #1
[  360.123446] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.125100] INFO: task qemu-system-x86:2308 blocked for more than 120 seconds.
[  360.126514]       Not tainted 3.16.0-4-amd64 #1
[  360.127370] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

and:

BUG: soft lockup - CPU#2 stuck for 22s! [kworker/2:1:34]

Attachments

• trace1
• trace2
• trace3
• trace_no_hpet_no_acpi
• trace_no_disk_cache_L1
• trace_qemu2.4
• trace_qemu2.4_cpus1

Related issues

• Related to #9264 (closed)
• Related to #10717 (closed)
• Blocked by #11178 (closed)

Original created by @intrigeri on 9157 (Redmine)