linux-kernel - Re: [PATCH 08/11] mm: fold page_lru_base

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Date:   Tue, 8 Dec 2020 17:02:54 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     Yu Zhao <yuzhao@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Roman Gushchin <guro@...com>, Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/11] mm: fold page_lru_base_type() into its sole caller

Reviewed-by: Alex Shi <alex.shi@...ux.alibaba.com>

在 2020/12/8 上午6:09, Yu Zhao 写道:
> We've removed all other references to this function.
> 
> Signed-off-by: Yu Zhao <yuzhao@...gle.com>
> ---
>  include/linux/mm_inline.h | 27 ++++++---------------------
>  1 file changed, 6 insertions(+), 21 deletions(-)
> 
> diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
> index 6d907a4dd6ad..7183c7a03f09 100644
> --- a/include/linux/mm_inline.h
> +++ b/include/linux/mm_inline.h
> @@ -45,21 +45,6 @@ static __always_inline void update_lru_size(struct lruvec *lruvec,
>  #endif
>  }
>  
> -/**
> - * page_lru_base_type - which LRU list type should a page be on?
> - * @page: the page to test
> - *
> - * Used for LRU list index arithmetic.
> - *
> - * Returns the base LRU type - file or anon - @page should be on.
> - */
> -static inline enum lru_list page_lru_base_type(struct page *page)
> -{
> -	if (page_is_file_lru(page))
> -		return LRU_INACTIVE_FILE;
> -	return LRU_INACTIVE_ANON;
> -}
> -
>  /**
>   * __clear_page_lru_flags - clear page lru flags before releasing a page
>   * @page: the page that was on lru and now has a zero reference
> @@ -92,12 +77,12 @@ static __always_inline enum lru_list page_lru(struct page *page)
>  	VM_BUG_ON_PAGE(PageActive(page) && PageUnevictable(page), page);
>  
>  	if (PageUnevictable(page))
> -		lru = LRU_UNEVICTABLE;
> -	else {
> -		lru = page_lru_base_type(page);
> -		if (PageActive(page))
> -			lru += LRU_ACTIVE;
> -	}
> +		return LRU_UNEVICTABLE;
> +
> +	lru = page_is_file_lru(page) ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON;
> +	if (PageActive(page))
> +		lru += LRU_ACTIVE;
> +
>  	return lru;
>  }
>  
>