Re: Fwd: [powerpc/Baremetal]Kernel OOPS while executing memory hotplug on Power8 baremetal

[vrbagal1 <vrbagal1@linux.vnet.ibm.com>]

On 2018-06-07 13:12, Bart Van Assche wrote:
> On Thu, 2018-06-07 at 12:56 +0530, Venkat Rao B wrote:
>> On Thursday 07 June 2018 12:46 PM, Bart Van Assche wrote:
>> > On Thu, 2018-06-07 at 12:38 +0530, vrbagal1 wrote:
>> > > 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

Regards,
Venkat.