linux-kernel - Re: [PATCH] mm: page_alloc: remove duplication of free_one

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Date: Wed, 20 Dec 2023 17:43:18 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: casper.li@...iatek.com, chinwen.chang@...iatek.com,
 qun-wei.lin@...iatek.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] mm: page_alloc: remove duplication of free_one_page()

Hi,

On 12/20/2023 3:47 PM, Kuan-Ying Lee wrote:
> Remove duplication of free_one_page().
> 
> Cc: Casper Li <casper.li@...iatek.com>
> Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>

Just FYI:
There is already a same patch submitted, see: 
https://lore.kernel.org/all/20231216030503.2126130-1-yajun.deng@linux.dev/T/#u

> ---
>   mm/page_alloc.c | 9 +--------
>   1 file changed, 1 insertion(+), 8 deletions(-)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 2f646773a934..f46af8616cac 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -1262,7 +1262,6 @@ static void free_one_page(struct zone *zone,
>   static void __free_pages_ok(struct page *page, unsigned int order,
>   			    fpi_t fpi_flags)
>   {
> -	unsigned long flags;
>   	int migratetype;
>   	unsigned long pfn = page_to_pfn(page);
>   	struct zone *zone = page_zone(page);
> @@ -1277,13 +1276,7 @@ static void __free_pages_ok(struct page *page, unsigned int order,
>   	 */
>   	migratetype = get_pfnblock_migratetype(page, pfn);
>   
> -	spin_lock_irqsave(&zone->lock, flags);
> -	if (unlikely(has_isolate_pageblock(zone) ||
> -		is_migrate_isolate(migratetype))) {
> -		migratetype = get_pfnblock_migratetype(page, pfn);
> -	}
> -	__free_one_page(page, pfn, zone, order, migratetype, fpi_flags);
> -	spin_unlock_irqrestore(&zone->lock, flags);
> +	free_one_page(zone, page, pfn, order, migratetype, fpi_flags);
>   
>   	__count_vm_events(PGFREE, 1 << order);
>   }