Messages in this thread | | | Date | Mon, 13 Jan 2020 16:23:08 +0800 | From | Wei Yang <> | Subject | Re: [Patch v2] mm: thp: grab the lock before manipulation defer list |
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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 Help you, Help me
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