linux-kernel - Re: [PATCH] nvme/pci: make PRP list DMA pools per-NUMA-node

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Message-ID: <be873f40-d3c4-4f0e-8b36-dc6e4f5bcf48@samsung.com>
Date: Mon, 21 Apr 2025 12:43:24 +0530
From: Kanchan Joshi <joshi.k@...sung.com>
To: Caleb Sander Mateos <csander@...estorage.com>, Keith Busch
	<kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>, Christoph Hellwig
	<hch@....de>, Sagi Grimberg <sagi@...mberg.me>
Cc: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme/pci: make PRP list DMA pools per-NUMA-node

On 4/20/2025 10:14 PM, Caleb Sander Mateos wrote:
> struct nvme_dev {
>   	struct nvme_queue *queues;
>   	struct blk_mq_tag_set tagset;
>   	struct blk_mq_tag_set admin_tagset;
>   	u32 __iomem *dbs;
>   	struct device *dev;
> -	struct dma_pool *prp_page_pool;
> -	struct dma_pool *prp_small_pool;
> +	struct nvme_prp_dma_pools prp_pools[MAX_NUMNODES];

I wonder if it is worth to make this dynamic using nr_node_ids?