On 25/03/2021 11:33, Stefano Garzarella wrote: > Hi Jens, Hi Pavel, > I was taking a look at the new SQPOLL handling with io_thread instead of kthread. Great job! Really nice feature that maybe can be reused also in other scenarios (e.g. vhost). > > Regarding SQPOLL, IIUC these new threads are much closer to user threads, so is there still a need to require CAP_SYS_ADMIN and CAP_SYS_NICE to enable SQPOLL? Hmm, good question. If there are under same cgroup (should be in theory), and if we add more scheduling points (i.e. need_resched()), and don't see a reason why not. Jens? Better not right away though. IMHO it's safer to let the change settle down for some time. -- Pavel Begunkov
