linux-kernel - Re: [virtio-dev] Re: [PATCH v2 4/5] virtio-mmio: add MSI interrupt feature support

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Message-ID: <4557a5e8-74eb-f238-1579-b7b558cb2969@redhat.com>
Date:   Wed, 12 Feb 2020 17:03:00 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     virtio-dev@...ts.oasis-open.org,
        Zha Bin <zhabin@...ux.alibaba.com>, slp@...hat.com,
        "Liu, Jing2" <jing2.liu@...ux.intel.com>,
        linux-kernel@...r.kernel.org, qemu-devel@...gnu.org,
        chao.p.peng@...ux.intel.com, gerry@...ux.alibaba.com
Subject: Re: [virtio-dev] Re: [PATCH v2 4/5] virtio-mmio: add MSI interrupt
 feature support


On 2020/2/11 下午10:00, Michael S. Tsirkin wrote:
>> Yes, it can work but it may bring extra effort when you want to mask a
>> vector which is was shared by a lot of queues.
>>
>> Thanks
>>
> masking should be per vq too.
>
> -- 


Yes, but if the vector is shard by e.g 16 queues, then all those 
virtqueues needs to be masked which is expensive.

Thanks