vrbagal1 [off-list ref] writes:

On 2018-06-07 13:12, Bart Van Assche wrote:

quoted

On Thu, 2018-06-07 at 12:56 +0530, Venkat Rao B wrote:

quoted

On Thursday 07 June 2018 12:46 PM, Bart Van Assche wrote:

quoted

On Thu, 2018-06-07 at 12:38 +0530, vrbagal1 wrote:

quoted

Observing Kernel oops and machine reboots while executing memory hotplug
test case, on Power8 Baremetal machine.

I see this is introduced some where between rc6 and 4.17.

Please provide the exact versions (git commit IDs) of the kernel versions
you have tested.

Commit Id ---> 5037be168f

The reason I was asking for the commit ID is because I saw that 
clone_endio()
occurs in the oops which means that the dm driver is involved. An 
important fix
for the dm driver went upstream recently, namely d37753540568 ("dm: Use 
kzalloc
for all structs with embedded biosets/mempools"). Can you double check 
whether
that commit it present in your tree? If it is not present, please 
update to the
latest master and retest. If it is present, please report how to 
reproduce
this oops to Kent Overstreet, Jens Axboe, linux-block and Mike Snitzer.

Thanks,

Bart.

Yes, the fix is present in the tree, which I have tested.

Steps to reproduce:

Step1: Clone and Install avocado git clone 
https://github.com/avocado-framework/avocado.git
Step2: Clone 
https://github.com/avocado-framework-tests/avocado-misc-tests.git
        Test case is 
https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/memhotplug.py
Step3: Command to run the test is avocado run 
avocado-misc-tests/memory/memhotplug.py

That gave me:

  $ avocado run avocado-misc-tests/memory/memhotplug.py
  avocado: command not found

Was I meant to install it?

I tried this which worked (I think):

  $ ./scripts/avocado run avocado-misc-tests/memory/memhotplug.py
  Failed to load plugin from module "avocado_runner_vm": ImportError('No module named libvirt',)
  JOB ID     : 28deb5a455fb876a7e177deb2b46eab640f313c8
  JOB LOG    : /home/michael/avocado/job-results/job-2018-06-07T22.27-28deb5a/job.log
   (1/4) avocado-misc-tests/memory/memhotplug.py:memstress.test_hotplug_loop: PASS (10.62 s)
   (2/4) avocado-misc-tests/memory/memhotplug.py:memstress.test_hotplug_toggle: PASS (245.15 s)
   (3/4) avocado-misc-tests/memory/memhotplug.py:memstress.test_dlpar_mem_hotplug: PASS (0.37 s)
   (4/4) avocado-misc-tests/memory/memhotplug.py:memstress.test_hotplug_per_numa_node: PASS (41.09 s)
  RESULTS    : PASS 4 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0
  JOB TIME   : 323.45 s
  JOB HTML   : /home/michael/avocado/job-results/job-2018-06-07T22.27-28deb5a/results.html


So what's different about your system?

What does 'lsblk -O' say on your system?

cheers