Re: [Patch v2] mm: thp: grab the lock before manipulation defer list

Wei Yang
2020-01-13T08:23:08Z

On Mon, Jan 13, 2020 at 10:36:14AM +0300, Kirill A. Shutemov wrote:
>On Mon, Jan 13, 2020 at 08:44:57AM +0800, Wei Yang wrote:
>> >> It is possible two page in the same pgdate or memcg grab page lock
>> >> respectively and then access the same defer queue concurrently.
>>
>> If my understanding is correct, you agree with my statement?
>
>Which one? If the one above then no. list_empty only accesses list_head
>for the struct page, not the queue.
>

Ah, I get your point.

>--
> Kirill A. Shutemov

--
Wei Yang
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