linux-kernel - Re: [PATCH net-next v2] net: page_pool: optimize page pool page allocation in NUMA scenario

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Date:   Thu, 30 Jun 2022 21:15:34 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Guangbin Huang <huangguangbin2@...wei.com>
Cc:     <jbrouer@...hat.com>, <hawk@...nel.org>, <brouer@...hat.com>,
        <ilias.apalodimas@...aro.org>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <pabeni@...hat.com>, <lorenzo@...nel.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>, <lipeng321@...wei.com>,
        <chenhao288@...ilicon.com>
Subject: Re: [PATCH net-next v2] net: page_pool: optimize page pool page
 allocation in NUMA scenario

On Wed, 29 Jun 2022 21:33:05 +0800 Guangbin Huang wrote:
> +#ifdef CONFIG_NUMA
> +	pref_nid = (pool->p.nid == NUMA_NO_NODE) ? numa_mem_id() : pool->p.nid;
> +#else
> +	/* Ignore pool->p.nid setting if !CONFIG_NUMA */
> +	pref_nid = NUMA_NO_NODE;
> +#endif

Please factor this out to a helper, this is a copy of the code from
page_pool_refill_alloc_cache() and #ifdefs are a little yuck.