linux-kernel - Re: [RFC PATCH 16/20] mm: Allocate kswapd on its node

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Message-ID: <29d91335-de79-422c-9cef-475e524f6ebe@suse.cz>
Date: Wed, 31 Jul 2024 17:08:49 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Frederic Weisbecker <frederic@...nel.org>,
 LKML <linux-kernel@...r.kernel.org>
Cc: Michal Hocko <mhocko@...nel.org>, linux-mm@...ck.org,
 Andrew Morton <akpm@...ux-foundation.org>,
 Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC PATCH 16/20] mm: Allocate kswapd on its node

On 7/26/24 11:56 PM, Frederic Weisbecker wrote:
> kswapd runs preferrably on a specific node. Allocate its task
> structure accordingly for better memory locality.
> 
> Signed-off-by: Frederic Weisbecker <frederic@...nel.org>

Acked-by: Vlastimil Babka <vbabka@...e.cz>

also squashable to the previous one

> ---
>  mm/vmscan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index 94359a893b4f..adf8c1e7e89d 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -7284,7 +7284,7 @@ void __meminit kswapd_run(int nid)
>  
>  	pgdat_kswapd_lock(pgdat);
>  	if (!pgdat->kswapd) {
> -		pgdat->kswapd = kthread_create(kswapd, pgdat, "kswapd%d", nid);
> +		pgdat->kswapd = kthread_create_on_node(kswapd, pgdat, nid, "kswapd%d", nid);
>  		if (IS_ERR(pgdat->kswapd)) {
>  			/* failure at boot is fatal */
>  			pr_err("Failed to start kswapd on node %d，ret=%ld\n",