From: Jason Wang <jasowang@redhat.com>
To: Yongji Xie <xieyongji@bytedance.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Stefano Garzarella <sgarzare@redhat.com>,
Parav Pandit <parav@nvidia.com>, Bob Liu <bob.liu@oracle.com>,
Christoph Hellwig <hch@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
Matthew Wilcox <willy@infradead.org>,
viro@zeniv.linux.org.uk, Jens Axboe <axboe@kernel.dk>,
bcrl@kvack.org, Jonathan Corbet <corbet@lwn.net>,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [RFC v4 11/11] vduse: Support binding irq to the specified cpu
Date: Fri, 5 Mar 2021 11:11:38 +0800 [thread overview]
Message-ID: <86af7b84-23f0-dca7-183b-e4d586cbcea6@redhat.com> (raw)
In-Reply-To: <CACycT3uaOU5ybwojfiSL0kSpW9GUnh82ZeDH7drdkfK72iP8bg@mail.gmail.com>
On 2021/3/4 4:19 下午, Yongji Xie wrote:
> On Thu, Mar 4, 2021 at 3:30 PM Jason Wang <jasowang@redhat.com> wrote:
>>
>> On 2021/2/23 7:50 下午, Xie Yongji wrote:
>>> Add a parameter for the ioctl VDUSE_INJECT_VQ_IRQ to support
>>> injecting virtqueue's interrupt to the specified cpu.
>>
>> How userspace know which CPU is this irq for? It looks to me we need to
>> do it at different level.
>>
>> E.g introduce some API in sys to allow admin to tune for that.
>>
>> But I think we can do that in antoher patch on top of this series.
>>
> OK. I will think more about it.
It should be soemthing like
/sys/class/vduse/$dev_name/vq/0/irq_affinity. Also need to make sure
eventfd could not be reused.
Thanks
>
> Thanks,
> Yongji
>
WARNING: multiple messages have this Message-ID (diff)
From: Jason Wang <jasowang@redhat.com>
To: Yongji Xie <xieyongji@bytedance.com>
Cc: Jens Axboe <axboe@kernel.dk>, Jonathan Corbet <corbet@lwn.net>,
kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
linux-aio@kvack.org, netdev@vger.kernel.org,
Randy Dunlap <rdunlap@infradead.org>,
Matthew Wilcox <willy@infradead.org>,
virtualization@lists.linux-foundation.org,
Christoph Hellwig <hch@infradead.org>,
Bob Liu <bob.liu@oracle.com>,
bcrl@kvack.org, viro@zeniv.linux.org.uk,
Stefan Hajnoczi <stefanha@redhat.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: [RFC v4 11/11] vduse: Support binding irq to the specified cpu
Date: Fri, 5 Mar 2021 11:11:38 +0800 [thread overview]
Message-ID: <86af7b84-23f0-dca7-183b-e4d586cbcea6@redhat.com> (raw)
In-Reply-To: <CACycT3uaOU5ybwojfiSL0kSpW9GUnh82ZeDH7drdkfK72iP8bg@mail.gmail.com>
On 2021/3/4 4:19 下午, Yongji Xie wrote:
> On Thu, Mar 4, 2021 at 3:30 PM Jason Wang <jasowang@redhat.com> wrote:
>>
>> On 2021/2/23 7:50 下午, Xie Yongji wrote:
>>> Add a parameter for the ioctl VDUSE_INJECT_VQ_IRQ to support
>>> injecting virtqueue's interrupt to the specified cpu.
>>
>> How userspace know which CPU is this irq for? It looks to me we need to
>> do it at different level.
>>
>> E.g introduce some API in sys to allow admin to tune for that.
>>
>> But I think we can do that in antoher patch on top of this series.
>>
> OK. I will think more about it.
It should be soemthing like
/sys/class/vduse/$dev_name/vq/0/irq_affinity. Also need to make sure
eventfd could not be reused.
Thanks
>
> Thanks,
> Yongji
>
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next prev parent reply other threads:[~2021-03-05 3:11 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-23 11:50 [RFC v4 00/11] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-02-23 11:50 ` [RFC v4 01/11] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji
2021-03-02 6:44 ` Jason Wang
2021-03-02 6:44 ` Jason Wang
2021-03-02 10:32 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 02/11] vhost-vdpa: protect concurrent access to vhost device iotlb Xie Yongji
2021-03-02 6:47 ` Jason Wang
2021-03-02 6:47 ` Jason Wang
2021-03-02 10:20 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 03/11] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-03-02 6:49 ` Jason Wang
2021-03-02 6:49 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 04/11] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-03-02 6:50 ` Jason Wang
2021-03-02 6:50 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 05/11] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-02-24 7:37 ` Dan Carpenter
2021-02-24 7:37 ` Dan Carpenter
2021-03-03 10:52 ` Mika Penttilä
2021-03-03 12:45 ` Yongji Xie
2021-03-03 13:38 ` Mika Penttilä
2021-03-04 3:07 ` Jason Wang
2021-03-04 3:07 ` Jason Wang
2021-03-04 5:40 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 06/11] vduse: Implement an MMU-based IOMMU driver Xie Yongji
2021-03-04 4:20 ` Jason Wang
2021-03-04 4:20 ` Jason Wang
2021-03-04 5:12 ` Yongji Xie
2021-03-05 3:35 ` Jason Wang
2021-03-05 3:35 ` Jason Wang
2021-03-05 6:15 ` Yongji Xie
2021-03-05 6:51 ` Jason Wang
2021-03-05 7:13 ` Yongji Xie
2021-03-05 7:27 ` Jason Wang
2021-03-05 7:27 ` Jason Wang
2021-03-05 7:59 ` Yongji Xie
2021-03-08 3:17 ` Jason Wang
2021-03-08 3:17 ` Jason Wang
2021-03-08 3:45 ` Yongji Xie
2021-03-08 3:52 ` Jason Wang
2021-03-08 3:52 ` Jason Wang
2021-03-08 5:05 ` Yongji Xie
2021-03-08 7:04 ` Jason Wang
2021-03-08 7:04 ` Jason Wang
2021-03-08 7:08 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 07/11] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-02-23 15:44 ` kernel test robot
2021-02-23 20:24 ` kernel test robot
2021-03-04 6:27 ` Jason Wang
2021-03-04 6:27 ` Jason Wang
2021-03-04 8:05 ` Yongji Xie
2021-03-05 3:20 ` Jason Wang
2021-03-05 3:20 ` Jason Wang
2021-03-05 3:49 ` Yongji Xie
2021-03-10 12:58 ` Jason Wang
2021-03-10 12:58 ` Jason Wang
2021-03-11 2:28 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 08/11] vduse: Add config interrupt support Xie Yongji
2021-02-23 11:50 ` [RFC v4 09/11] Documentation: Add documentation for VDUSE Xie Yongji
2021-03-04 6:39 ` Jason Wang
2021-03-04 6:39 ` Jason Wang
2021-03-04 10:35 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 10/11] vduse: Introduce a workqueue for irq injection Xie Yongji
2021-03-04 6:59 ` Jason Wang
2021-03-04 6:59 ` Jason Wang
2021-03-04 8:58 ` Yongji Xie
2021-03-05 3:04 ` Jason Wang
2021-03-05 3:04 ` Jason Wang
2021-03-05 3:30 ` Yongji Xie
2021-03-05 3:42 ` Jason Wang
2021-03-05 3:42 ` Jason Wang
2021-03-05 6:36 ` Yongji Xie
2021-03-05 7:01 ` Jason Wang
2021-03-05 7:01 ` Jason Wang
2021-03-05 7:27 ` Yongji Xie
2021-03-05 7:36 ` Jason Wang
2021-03-05 7:36 ` Jason Wang
2021-03-05 8:12 ` Yongji Xie
2021-03-08 3:04 ` Jason Wang
2021-03-08 3:04 ` Jason Wang
2021-03-08 4:50 ` Yongji Xie
2021-03-08 7:01 ` Jason Wang
2021-03-08 7:01 ` Jason Wang
2021-03-08 7:16 ` Yongji Xie
2021-03-08 7:29 ` Jason Wang
2021-03-08 7:29 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 11/11] vduse: Support binding irq to the specified cpu Xie Yongji
2021-03-04 7:30 ` Jason Wang
2021-03-04 7:30 ` Jason Wang
2021-03-04 8:19 ` Yongji Xie
2021-03-05 3:11 ` Jason Wang [this message]
2021-03-05 3:11 ` Jason Wang
2021-03-05 3:37 ` Yongji Xie
2021-03-05 3:44 ` Jason Wang
2021-03-05 3:44 ` Jason Wang
2021-03-05 6:40 ` Yongji Xie
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