linux-kernel - Re: [PATCH v2 2/7] mm/compaction: call list_is_{first}/{last} more intuitively in move_freelist

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Date:   Tue, 29 Aug 2023 10:18:08 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Kemeng Shi <shikemeng@...weicloud.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, baolin.wang@...ux.alibaba.com,
        david@...hat.com, willy@...radead.org
Subject: Re: [PATCH v2 2/7] mm/compaction: call list_is_{first}/{last} more
 intuitively in move_freelist_{head}/{tail}

On Sat, Aug 26, 2023 at 11:36:12PM +0800, Kemeng Shi wrote:
> We use move_freelist_head after list_for_each_entry_reverse to skip
> recent pages. And there is no need to do actual move if all freepages
> are searched in list_for_each_entry_reverse, e.g. freepage point to
> first page in freelist. It's more intuitively to call list_is_first
> with list entry as the first argument and list head as the second
> argument to check if list entry is the first list entry instead of
> call list_is_last with list entry and list head passed in reverse.
> 
> Similarly, call list_is_last in move_freelist_tail is more intuitively.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
> Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

Acked-by: Mel Gorman <mgorman@...hsingularity.net>

-- 
Mel Gorman
SUSE Labs