On 23/05/2016 04:43, Fam Zheng wrote: > > The batch notification BH needs to know which virtqueues to notify when > > multiqueue is enabled. Use a bitmap to track the virtqueues that with > > pending notifications. > > This approach works great as long as VQs are in the same iothread. An > alternative way would be using separate BH per VQ, which will naturely work > with > multi queue block layer in the future. Should we just go for that in the > first > place? Seems less code churn, and no imaginable disadvantage compared to this > patch.
It can be slower because all BHs are walked during aio_bh_poll, not just the scheduled ones. Paolo
