On 6/8/2022 11:07 PM, Matthew Wilcox wrote:
> On Wed, Jun 08, 2022 at 10:38:19PM +0800, kernel test robot wrote:
>>
>>
>> Greeting,
>>
>> FYI, we noticed the following commit (built with gcc-11):
>>
>> commit: 9b12e49e9b02bbaca8041f236a6b2fd4586d45c8 ("[RFC PATCH 3/3] mm: Add kernel PTE level pagetable pages account")
> 
>> [   75.338681][ T4873] BUG: Bad page state in process 444  pfn:20b066
>> [   75.338840][ T4873] page:0000000016cf0259 refcount:0 mapcount:-512 mapping:0000000000000000 index:0x0 pfn:0x20b066
> 
> mapcount:-512 is PG_table.  Somebody forgot to call
> pgtable_pte_page_dtor() (or similar)

Right. Thanks for reminding. :)