Re: [mm] 9b12e49e9b: BUG:Bad_page_state_in_process

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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. :)




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