linux-kernel - Re: [PATCH v3 4/8] blk-mp: introduce blk_mq_hctx_map

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Message-ID: <1c78d7ff-78d0-48e9-8da8-abd54018cbb4@suse.de>
Date: Wed, 13 Nov 2024 10:48:24 +0100
From: Hannes Reinecke <hare@...e.de>
To: Daniel Wagner <wagi@...nel.org>, 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>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: 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 v3 4/8] blk-mp: introduce blk_mq_hctx_map_queues

On 11/12/24 14:26, 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>
> 
> Signed-off-by: Daniel Wagner <wagi@...nel.org>
> ---
>   block/blk-mq-cpumap.c  | 37 +++++++++++++++++++++++++++++++++++++
>   include/linux/blk-mq.h |  2 ++
>   2 files changed, 39 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
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