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Date:   Thu, 29 Oct 2020 09:50:47 -0400
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     Alex Shi <alex.shi@linux.alibaba.com>
Cc:     akpm@linux-foundation.org, mgorman@techsingularity.net,
        tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru,
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        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        cgroups@vger.kernel.org, shakeelb@google.com,
        iamjoonsoo.kim@lge.com, richard.weiyang@gmail.com,
        kirill@shutemov.name, alexander.duyck@gmail.com,
        rong.a.chen@intel.com, mhocko@suse.com, vdavydov.dev@gmail.com,
        shy828301@gmail.com
Subject: Re: [PATCH v20 04/20] mm/thp: use head for head page in
 lru_add_page_tail
Message-ID: <20201029135047.GE599825@cmpxchg.org>
References: <1603968305-8026-1-git-send-email-alex.shi@linux.alibaba.com>
 <1603968305-8026-5-git-send-email-alex.shi@linux.alibaba.com>
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On Thu, Oct 29, 2020 at 06:44:49PM +0800, Alex Shi wrote:
> Since the first parameter is only used by head page, it's better to make
> it explicit.
> 
> Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Acked-by: Hugh Dickins <hughd@google.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Johannes Weiner <hannes@cmpxchg.org>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Hugh Dickins <hughd@google.com>
> Cc: linux-mm@kvack.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  mm/huge_memory.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 038db815ebba..93c0b73eb8c6 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -2346,19 +2346,19 @@ static void remap_page(struct page *page, unsigned int nr)
>  	}
>  }
>  
> -static void lru_add_page_tail(struct page *page, struct page *page_tail,
> +static void lru_add_page_tail(struct page *head, struct page *page_tail,

It may be better to pick either
	head and tail
or
	page_head and page_tail

?