Re: [PATCH] mm: remove offset check on page->compound_head and folio->lru

Wei Yang
2022-01-07T13:41:04Z

On Fri, Jan 07, 2022 at 03:59:01AM +0000, Matthew Wilcox wrote:
>On Thu, Jan 06, 2022 at 11:52:54PM +0000, Wei Yang wrote:
>> FOLIO_MATCH() is used to make sure struct page and folio has identical
>> layout for the first several words.
>>
>> The comparison of offset between page->compound_head and folio->lru is
>> more like an internal check in struct page.
>>
>> This patch just removes it.
>>
>> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
>
>No.

Hi, Matthew

Would you mind sharing some insight on this check?