On Wed, 2022-02-09 at 11:34 +0800, Hao Xu wrote: > 在 2022/2/9 上午1:05, Jens Axboe 写道: > > On 2/8/22 7:58 AM, Olivier Langlois wrote: > > > Hi, > > > > > > I was wondering if integrating the NAPI busy poll for socket fds > > > into > > > io_uring like how select/poll/epoll are doing has ever been > > > considered? > > > > > > It seems to me that it could be an awesome feature when used > > > along with > > > a io_qpoll thread and something not too difficult to add... > > > > Should be totally doable and it's been brought up before, just > > needs > > someone to actually do it... Would love to see it. > > > We've done some investigation before, would like to have a try. > Hao, Let me know if I can help you with coding or testing. I have done very preliminary investigation too. It doesn't seem like it would be very hard to implement but I get confused with small details. For instance, the epoll implementation, unless there is something that I don't understand, appears to have a serious limitation. It seems like it would not work correctly if there are sockets associated to more than 1 NAPI device in the fd set. As far as I am concerned, that limitation would be ok since in my setup I only use 1 device but if it was necessary to be better than the epoll implementation, I am not sure at all how this could be addressed. I do not have enough kernel dev experience to find easy solutions to those type of issues... Worse case scenario, I guess that I could give it a shot creating a good enough implementation for my needs and show it to the list to get feedback... Greetings, Olivier
