From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: virtio-dev@lists.oasis-open.org,
Zha Bin <zhabin@linux.alibaba.com>,
slp@redhat.com, "Liu, Jing2" <jing2.liu@linux.intel.com>,
linux-kernel@vger.kernel.org, qemu-devel@nongnu.org,
chao.p.peng@linux.intel.com, gerry@linux.alibaba.com
Subject: Re: [virtio-dev] Re: [PATCH v2 4/5] virtio-mmio: add MSI interrupt feature support
Date: Wed, 12 Feb 2020 04:15:01 -0500 [thread overview]
Message-ID: <20200212041317-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <4557a5e8-74eb-f238-1579-b7b558cb2969@redhat.com>
On Wed, Feb 12, 2020 at 05:03:00PM +0800, Jason Wang wrote:
>
> 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
I think that's ok - masking is rare. in fact if vectors can be
changed atomically I'm no longer sure they are needed,
maybe a destructive "disable" which can lose interrupts
is enough.
--
MST
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next prev parent reply other threads:[~2020-02-12 9:15 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1581305609.git.zhabin@linux.alibaba.com>
2020-02-10 11:44 ` [virtio-dev] Re: [PATCH v2 0/5] virtio mmio specification enhancement Michael S. Tsirkin
[not found] ` <20200211160541.GA37446@chaop.bj.intel.com>
2020-02-11 10:57 ` Michael S. Tsirkin
[not found] ` <4c3d13be5a391b1fc50416838de57d903cbf8038.1581305609.git.zhabin@linux.alibaba.com>
2020-02-11 3:17 ` [virtio-dev] Re: [PATCH v2 4/5] virtio-mmio: add MSI interrupt feature support Jason Wang
2020-02-11 3:35 ` Liu, Jing2
2020-02-11 4:02 ` Jason Wang
2020-02-11 6:02 ` Liu, Jing2
2020-02-11 7:40 ` Jason Wang
2020-02-11 11:58 ` Michael S. Tsirkin
2020-02-11 12:04 ` Jason Wang
2020-02-11 12:08 ` Michael S. Tsirkin
2020-02-11 12:18 ` Jason Wang
2020-02-11 14:00 ` Michael S. Tsirkin
2020-02-12 9:03 ` Jason Wang
2020-02-12 9:15 ` Michael S. Tsirkin [this message]
2020-02-12 3:54 ` Liu, Jing2
2020-02-12 7:33 ` Michael S. Tsirkin
2020-02-12 9:06 ` Jason Wang
2020-02-12 9:16 ` Michael S. Tsirkin
2020-02-13 3:40 ` Jason Wang
2020-02-11 11:21 ` Michael S. Tsirkin
2020-02-11 11:11 ` Michael S. Tsirkin
[not found] ` <946b71e77a34666a9b8c419c5a467d1628b50fa0.1581305609.git.zhabin@linux.alibaba.com>
2020-02-11 11:14 ` [virtio-dev] Re: [PATCH v2 5/5] x86: virtio-mmio: support virtio-mmio with MSI for x86 Michael S. Tsirkin
[not found] ` <4c52548758eefe1fe7078d3b6f10492a001c0636.1581305609.git.zhabin@linux.alibaba.com>
2020-02-11 11:16 ` [virtio-dev] Re: [PATCH v2 3/5] virtio-mmio: create a generic MSI irq domain Michael S. Tsirkin
2020-02-12 7:40 ` Michael S. Tsirkin
[not found] ` <0268807dc26ecdf5620de9000758d05ca0b21f3f.1581305609.git.zhabin@linux.alibaba.com>
2020-02-11 11:19 ` [virtio-dev] Re: [PATCH v2 2/5] virtio-mmio: refactor common functionality Michael S. Tsirkin
2020-02-12 2:58 ` Liu, Jing2
2020-02-12 7:29 ` Michael S. Tsirkin
[not found] ` <8a4ea95d6d77a2814aaf6897b5517353289a098e.1581305609.git.zhabin@linux.alibaba.com>
2020-02-11 10:50 ` [virtio-dev] Re: [PATCH v2 1/5] virtio-mmio: add notify feature for per-queue Michael S. Tsirkin
2020-02-11 11:33 ` Michael S. Tsirkin
2020-02-12 3:39 ` Jason Wang
2020-02-12 8:18 ` Michael S. Tsirkin
2020-02-12 8:53 ` Jason Wang
2020-02-12 9:33 ` Jason Wang
2020-02-12 9:55 ` Michael S. Tsirkin
2020-02-13 3:38 ` Jason Wang
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