linux-kernel - Re: [PATCH v5 4/8] blk-mq: introduce blk_mq_map_hw

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Message-ID: <Zz6kZ7QZV9HKSWVR@fedora>
Date: Thu, 21 Nov 2024 11:09:27 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Daniel Wagner <wagi@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>, Bjorn Helgaas <bhelgaas@...gle.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Keith Busch <kbusch@...nel.org>, Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>,
	John Garry <john.g.garry@...cle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Hannes Reinecke <hare@...e.de>, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	virtualization@...ts.linux.dev, linux-scsi@...r.kernel.org,
	megaraidlinux.pdl@...adcom.com, mpi3mr-linuxdrv.pdl@...adcom.com,
	MPT-FusionLinux.pdl@...adcom.com, storagedev@...rochip.com,
	linux-nvme@...ts.infradead.org
Subject: Re: [PATCH v5 4/8] blk-mq: introduce blk_mq_map_hw_queues

On Fri, Nov 15, 2024 at 05:37:48PM +0100, Daniel Wagner wrote:
> blk_mq_pci_map_queues and blk_mq_virtio_map_queues will create a CPU to
> hardware queue mapping based on affinity information. These two function
> share common code and only differ on how the affinity information is
> retrieved. Also, those functions are located in the block subsystem
> where it doesn't really fit in. They are virtio and pci subsystem
> specific.
> 
> Thus introduce provide a generic mapping function which uses the
> irq_get_affinity callback from bus_type.
> 
> Originally idea from Ming Lei <ming.lei@...hat.com>
> 
> Reviewed-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Hannes Reinecke <hare@...e.de>
> Signed-off-by: Daniel Wagner <wagi@...nel.org>

Reviewed-by: Ming Lei <ming.lei@...hat.com>

-- 
Ming