linux-kernel - Re: [PATCH 5/9] virtio: allow drivers to request IRQ affinity when creating VQs

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Message-ID: <315fa499-2b2c-e883-4097-a8c2c415dfd4@redhat.com>
Date:   Fri, 3 Feb 2017 16:01:04 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Christoph Hellwig <hch@....de>, mst@...hat.com
Cc:     axboe@...nel.dk, pbonzini@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/9] virtio: allow drivers to request IRQ affinity when
 creating VQs



On 2017年01月27日 16:16, Christoph Hellwig wrote:
> Add a struct irq_affinity pointer to the find_vqs methods, which if set
> is used to tell the PCI layer to create the MSI-X vectors for our I/O
> virtqueues with the proper affinity from the start.  Compared to after
> the fact affinity hints this gives us an instantly working setup and
> allows to allocate the irq descritors node-local and avoid interconnect
> traffic.  Last but not least this will allow blk-mq queues are created
> based on the interrupt affinity for storage drivers.
>
> Signed-off-by: Christoph Hellwig<hch@....de>
> ---

Reviewed-by: Jason Wang <jasowang@...hat.com>