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Date: Thu, 14 Nov 2024 13:11:47 +0100
From: Christoph Hellwig <hch@lst.de>
To: Daniel Wagner <dwagner@suse.de>
Cc: Ming Lei <ming.lei@redhat.com>, Daniel Wagner <wagi@kernel.org>,
	Jens Axboe <axboe@kernel.dk>, Bjorn Helgaas <bhelgaas@google.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
	Eugenio =?iso-8859-1?Q?P=E9rez?= <eperezma@redhat.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Keith Busch <kbusch@kernel.org>, Christoph Hellwig <hch@lst.de>,
	Sagi Grimberg <sagi@grimberg.me>,
	John Garry <john.g.garry@oracle.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Hannes Reinecke <hare@suse.de>, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
	virtualization@lists.linux.dev, linux-scsi@vger.kernel.org,
	megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com,
	MPT-FusionLinux.pdl@broadcom.com, storagedev@microchip.com,
	linux-nvme@lists.infradead.org
Subject: Re: [PATCH v4 05/10] blk-mq: introduce blk_mq_hctx_map_queues
Message-ID: <20241114121147.GA3074@lst.de>
References: <20241113-refactor-blk-affinity-helpers-v4-0-dd3baa1e267f@kernel.org> <20241113-refactor-blk-affinity-helpers-v4-5-dd3baa1e267f@kernel.org> <ZzVZQbZOYhNF08LX@fedora> <9fa26099-1922-4b99-883e-bd5f6c58162a@flourine.local> <ZzW-9rWvKBxFZU1E@fedora> <4bd491e5-fab5-4e94-8719-560b5a4de01e@flourine.local>
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On Thu, Nov 14, 2024 at 01:06:49PM +0100, Daniel Wagner wrote:
> Oh, I was not aware of this ordering. And after digging this up here:
> 
> https://lore.kernel.org/all/20060105142951.13.01@flint.arm.linux.org.uk/
> 
> I don't think we it's worthwhile to add the callback to device_driver
> just for hisi_sas_v2. So I am going to drop this part again.

Yes, I don't really see how querying driver specific information like
this from code called by the driver make much sense.