Re: [PATCH] mm: page_isolation: use compound_nr() correctly in isolate_single_pageblock()

[Muchun Song]

On Mon, May 30, 2022 at 10:44:50PM -0400, Zi Yan wrote:
> From: Zi Yan <ziy@xxxxxxxxxx>
> 
> When compound_nr(page) was used, page was not guaranteed to be the head
> of the compound page and it could cause an infinite loop. Fix it by calling
> it on the head page.
> 
> Fixes: b2c9e2fbba32 ("mm: make alloc_contig_range work at pageblock granularity")
> Reported-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
> Link: https://lore.kernel.org/linux-mm/20220530115027.123341-1-anshuman.khandual@xxxxxxx/
> Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>

Acked-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Thanks.