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Message-ID: <1921eae9-f428-e36c-6ee0-60872d5a340e@linux.alibaba.com>
Date: Tue, 15 Aug 2023 15:16:53 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Kemeng Shi <shikemeng@...weicloud.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
mgorman@...hsingularity.net, david@...hat.com
Subject: Re: [PATCH 1/9] mm/compaction: use correct list in
move_freelist_{head}/{tail}
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@...weicloud.com>
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> ---
> 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);
> }
> }
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