Subject: Re: [powerpc/powervm]kernel BUG at mm/memory_hotplug.c:1864!

From: Balbir Singh <[email-masked]>
Date: Tue, 12 Jun 2018 20:28:43 +1000

On 11/06/18 17:41, vrbagal1 wrote:
> On 2018-06-08 17:45, Oscar Salvador wrote:
>> On Fri, Jun 08, 2018 at 05:11:24PM +0530, vrbagal1 wrote:
>>> On 2018-06-08 16:58, Oscar Salvador wrote:
>>> >On Fri, Jun 08, 2018 at 04:44:24PM +0530, vrbagal1 wrote:
>>> >>Greetings!!!
>>> >>
>>> >>I am seeing kernel bug followed by oops message and system reboots,
>>> >>while
>>> >>running dlpar memory hotplug test.
>>> >>
>>> >>Machine Details: Power6 PowerVM Platform
>>> >>GCC version: (gcc version 4.8.3 20140911 (Red Hat 4.8.3-7) (GCC))
>>> >>Test case: dlpar memory hotplug test (https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/memhotplug.py)
>>> >>Kernel Version: Linux version 4.17.0-autotest
>>> >>
>>> >>I am seeing this bug on rc7 as well.
> 
> Observing similar traces on linux next kernel: 4.17.0-next-20180608-autotest
> 
>  Block size [0x4000000] unaligned hotplug range: start 0x220000000, size 0x1000000

size < block_size in this case, why? how? Could you confirm that the block size is 64MB and your trying to remove 16MB

Balbir Singh.