On 2024/10/26 15:33, Yunsheng Lin wrote: ... >>> >>> AFAIU Jakub's comment on his RFC patch for waiting, he was suggesting >>> exactly this: Add the wait, and see if the cases where it can stall turn >>> out to be problems in practice. >> >> +1 >> >> I like Jakub's approach. > > As mentioned in Toke's comment, I am still not convinced that there is some > easy way of waiting here, doing the kick in the kernel space is hard enough, > I am not even sure if kick need to be done or how it can be done in the user > space if some page_pool owned page is held from user space for the cases of zero > rx copy, io_uring and devmem tcp? killing the userspace app? > > If you and Toke still think the waiting is the way out for the problem here, maybe > we should wait for jakub's opinion and let him decide if he want to proceed with > his waiting patch. Is there any other suggestion/concern about how to fix the problem here?
