linux-kernel - Re: [PATCH 01/10] mm,hwpoison: cleanup unused PageHuge() check

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Date:   Wed, 11 Sep 2019 12:17:27 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Oscar Salvador <osalvador@...e.de>, n-horiguchi@...jp.nec.com
Cc:     mhocko@...nel.org, mike.kravetz@...cle.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/10] mm,hwpoison: cleanup unused PageHuge() check

On 10.09.19 12:30, Oscar Salvador wrote:
> From: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> 
> memory_failure() forks to memory_failure_hugetlb() for hugetlb pages,
> so a PageHuge() check after the fork should not be necessary.
> 
> Signed-off-by: Oscar Salvador <osalvador@...e.de>
> Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
>  mm/memory-failure.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 7ef849da8278..e43b61462fd5 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -1353,10 +1353,7 @@ int memory_failure(unsigned long pfn, int flags)
>  	 * page_remove_rmap() in try_to_unmap_one(). So to determine page status
>  	 * correctly, we save a copy of the page flags at this time.
>  	 */
> -	if (PageHuge(p))
> -		page_flags = hpage->flags;
> -	else
> -		page_flags = p->flags;
> +	page_flags = p->flags;
>  
>  	/*
>  	 * unpoison always clear PG_hwpoison inside page lock
> 

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 

Thanks,

David / dhildenb