Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq

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To: Ming Lei <ming.lei@xxxxxxxxxx>
Subject: Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
From: Christoph Hellwig <hch@xxxxxx>
Date: Wed, 7 Jul 2021 16:05:29 +0200
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, Sagi Grimberg <sagi@xxxxxxxxxxx>, Daniel Wagner <dwagner@xxxxxxx>, Wen Xiong <wenxiong@xxxxxxxxxx>, John Garry <john.garry@xxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, Keith Busch <kbusch@xxxxxxxxxx>, Damien Le Moal <damien.lemoal@xxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
In-reply-to: <YOV3HgWG6F3geECm@T590>
References: <20210702150555.2401722-1-ming.lei@redhat.com> <20210702150555.2401722-6-ming.lei@redhat.com> <20210706054203.GC17027@lst.de> <87bl7eqyr2.ffs@nanos.tec.linutronix.de> <YOV3HgWG6F3geECm@T590>
User-agent: Mutt/1.5.17 (2007-11-01)

On Wed, Jul 07, 2021 at 05:42:54PM +0800, Ming Lei wrote:
> The problem is that how blk-mq looks at that flag, since the device
> representing the controller which allocates irq vectors isn't visible
> to blk-mq.

In blk_mq_pci_map_queues and similar helpers.

Follow-Ups:
- Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
  - From: Ming Lei

References:
- [PATCH V2 0/6] blk-mq: fix blk_mq_alloc_request_hctx
  - From: Ming Lei
- [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
  - From: Ming Lei
- Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
  - From: Christoph Hellwig
- Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
  - From: Thomas Gleixner
- Re: [PATCH V2 5/6] virtio: add one field into virtio_device for recording if device uses managed irq
  - From: Ming Lei

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