On Thu, 29 Jul 2021 09:40:19 +0800 kernel test robot <oliver.sang@intel.com> wrote:

> 
> 
> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-9):
> 
> commit: 866b485262173a2b873386162b2ddcfbcb542b4a ("mm/page_owner: record the timestamp of all pages during free")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

I don't see how this can happen unless it's a side-effect of making
struct page_owner 8 bytes larger.  Does setting
/proc/sys/vm/oom_dump_tasks tell us more?