linux-kernel - Re: [PATCH] mm: compaction: mark kcompactd_run() and kcompactd_stop() _

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Date:   Mon, 12 Jun 2023 17:50:14 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Miaohe Lin <linmiaohe@...wei.com>, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: compaction: mark kcompactd_run() and kcompactd_stop()
 __meminit



On 6/10/2023 11:46 AM, Miaohe Lin wrote:
> Add __meminit to kcompactd_run() and kcompactd_stop() to ensure they're
> default to __init when memory hotplug is not enabled.
> 
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>

LGTM.
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> ---
>   include/linux/compaction.h | 4 ++--
>   mm/compaction.c            | 4 ++--
>   2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/compaction.h b/include/linux/compaction.h
> index 57b16e69c19a..e94776496049 100644
> --- a/include/linux/compaction.h
> +++ b/include/linux/compaction.h
> @@ -98,8 +98,8 @@ extern void compaction_defer_reset(struct zone *zone, int order,
>   bool compaction_zonelist_suitable(struct alloc_context *ac, int order,
>   					int alloc_flags);
>   
> -extern void kcompactd_run(int nid);
> -extern void kcompactd_stop(int nid);
> +extern void __meminit kcompactd_run(int nid);
> +extern void __meminit kcompactd_stop(int nid);
>   extern void wakeup_kcompactd(pg_data_t *pgdat, int order, int highest_zoneidx);
>   
>   #else
> diff --git a/mm/compaction.c b/mm/compaction.c
> index 3398ef3a55fe..8859cc91062f 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -3086,7 +3086,7 @@ static int kcompactd(void *p)
>    * This kcompactd start function will be called by init and node-hot-add.
>    * On node-hot-add, kcompactd will moved to proper cpus if cpus are hot-added.
>    */
> -void kcompactd_run(int nid)
> +void __meminit kcompactd_run(int nid)
>   {
>   	pg_data_t *pgdat = NODE_DATA(nid);
>   
> @@ -3104,7 +3104,7 @@ void kcompactd_run(int nid)
>    * Called by memory hotplug when all memory in a node is offlined. Caller must
>    * be holding mem_hotplug_begin/done().
>    */
> -void kcompactd_stop(int nid)
> +void __meminit kcompactd_stop(int nid)
>   {
>   	struct task_struct *kcompactd = NODE_DATA(nid)->kcompactd;
>