Jason Wang
2021-Mar-05 03:44 UTC
[RFC v4 11/11] vduse: Support binding irq to the specified cpu
On 2021/3/5 11:37 ??, Yongji Xie wrote:> On Fri, Mar 5, 2021 at 11:11 AM Jason Wang <jasowang at redhat.com> wrote: >> >> On 2021/3/4 4:19 ??, Yongji Xie wrote: >>> On Thu, Mar 4, 2021 at 3:30 PM Jason Wang <jasowang at redhat.com> wrote: >>>> On 2021/2/23 7:50 ??, 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. >> > Looks like we doesn't use eventfd now. Do you mean we need to use > eventfd in this case?No, I meant if we're using eventfd, do we allow a single eventfd to be used for injecting irq for more than one virtqueue? (If not, I guess it should be ok). Thanks> > Thanks, > Yongji >