linux-kernel - Re: [PATCH 2/2] mm/page_alloc: use get_pfnblock_migratetype to avoid extra page_to

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Message-ID: <20230821122102.uybh63ifycgmqm3a@techsingularity.net>
Date:   Mon, 21 Aug 2023 13:21:02 +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 2/2] mm/page_alloc: use get_pfnblock_migratetype to avoid
 extra page_to_pfn

On Fri, Aug 11, 2023 at 07:59:45PM +0800, Kemeng Shi wrote:
> We have get_pageblock_migratetype and get_pfnblock_migratetype to get
> migratetype of page. get_pfnblock_migratetype accepts both page and pfn
> from caller while get_pageblock_migratetype only accept page and get pfn
> with page_to_pfn from page.
> In case we already record pfn of page, we can simply call
> get_pfnblock_migratetype to avoid a page_to_pfn.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>

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

-- 
Mel Gorman
SUSE Labs