linux-kernel - Re: [PATCH v2 1/2] mm/compaction: correct comment of candidate pfn in fast_isolate

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Date:   Mon, 31 Jul 2023 11:13:22 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Kemeng Shi <shikemeng@...wei.com>, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] mm/compaction: correct comment of candidate pfn in
 fast_isolate_freepages



On 7/21/2023 11:09 PM, Kemeng Shi wrote:
> If no preferred one was not found, we will use candidate page with maximum
> pfn > min_pfn which is saved in high_pfn. Correct "minimum" to "maximum
> candidate" in comment.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...wei.com>

Yes, the 'minimum' can be confused. At least to me, it looks good.
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> ---
>   mm/compaction.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/compaction.c b/mm/compaction.c
> index eb1d3d9a422c..c0d8d08fc163 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -1526,7 +1526,7 @@ static void fast_isolate_freepages(struct compact_control *cc)
>   				break;
>   		}
>   
> -		/* Use a minimum pfn if a preferred one was not found */
> +		/* Use a maximum candidate pfn if a preferred one was not found */
>   		if (!page && high_pfn) {
>   			page = pfn_to_page(high_pfn);
>