Re: [PATCH 1/9] mm/compaction: use correct list in move_freelist_{head}/{tail}

[Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>]

On 8/5/2023 7:07 PM, Kemeng Shi wrote:
> The freepage is chained with buddy_list in freelist head. Use buddy_list
> instead of lru to correct the list operation.
>
> Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>

Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>

> ---
>   mm/compaction.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index ea61922a1619..513b1caeb4fa 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -1395,8 +1395,8 @@ move_freelist_head(struct list_head *freelist, struct page *freepage)
>   {
>   	LIST_HEAD(sublist);
>   
> -	if (!list_is_last(freelist, &freepage->lru)) {
> -		list_cut_before(&sublist, freelist, &freepage->lru);
> +	if (!list_is_last(freelist, &freepage->buddy_list)) {
> +		list_cut_before(&sublist, freelist, &freepage->buddy_list);
>   		list_splice_tail(&sublist, freelist);
>   	}
>   }
> @@ -1412,8 +1412,8 @@ move_freelist_tail(struct list_head *freelist, struct page *freepage)
>   {
>   	LIST_HEAD(sublist);
>   
> -	if (!list_is_first(freelist, &freepage->lru)) {
> -		list_cut_position(&sublist, freelist, &freepage->lru);
> +	if (!list_is_first(freelist, &freepage->buddy_list)) {
> +		list_cut_position(&sublist, freelist, &freepage->buddy_list);
>   		list_splice_tail(&sublist, freelist);
>   	}
>   }