linux-kernel - Re: [PATCH 1/2] mm/mm_init.c: move set_pageblock_order() to free_area

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Date:   Thu, 1 Jun 2023 13:34:50 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Haifeng Xu <haifeng.xu@...pee.com>
Cc:     mhocko@...nel.org, akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm/mm_init.c: move set_pageblock_order() to
 free_area_init()

On Thu, Jun 01, 2023 at 06:35:35AM +0000, Haifeng Xu wrote:
> pageblock_order only needs to be set once, there is no need to
> initialize it in every zone/node.
> 
> Signed-off-by: Haifeng Xu <haifeng.xu@...pee.com>

Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>

> ---
>  mm/mm_init.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/mm_init.c b/mm/mm_init.c
> index 93821824271a..232efac9a929 100644
> --- a/mm/mm_init.c
> +++ b/mm/mm_init.c
> @@ -1583,7 +1583,6 @@ static void __init free_area_init_core(struct pglist_data *pgdat)
>  		if (!size)
>  			continue;
>  
> -		set_pageblock_order();
>  		setup_usemap(zone);
>  		init_currently_empty_zone(zone, zone->zone_start_pfn, size);
>  	}
> @@ -1850,6 +1849,8 @@ void __init free_area_init(unsigned long *max_zone_pfn)
>  	/* Initialise every node */
>  	mminit_verify_pageflags_layout();
>  	setup_nr_node_ids();
> +	set_pageblock_order();
> +
>  	for_each_node(nid) {
>  		pg_data_t *pgdat;
>  
> -- 
> 2.25.1
> 

-- 
Sincerely yours,
Mike.