On 01.06.2018 18:25, Eric W. Biederman wrote: > Michal Hocko <[email protected]> writes: > >> On Fri 01-06-18 09:32:42, Eric W. Biederman wrote: >>> Michal Hocko <[email protected]> writes: >> [...] >>>> Group leader exiting early without tearing down the whole thread >>>> group should be quite rare as well. No question that somebody might do >>>> that on purpose though... >>> >>> The group leader exiting early is a completely legitimate and reasonable >>> thing to do, even if it is rare. >> >> I am not saying it isn't legitimate. But the most common case is the >> main thread waiting for its threads or calling exit which would tear the >> whole group down. Is there any easy way to achieve this other than tkill >> to group leader? Calling exit(3) from the leader performs group exit >> IIRC. > > pthread_exit from the group leader. > >> I am not arguing this is non-issue. And it certainly is a problem once >> somebody wants to be nasty... I was more interested how often this >> really happens for sane workloads. > > That is a fair question. All I know for certain is that whatever Kirill > Tkhai's workload was it was triggering this the slow path.
It was triggered on a server, where many VPS of many people are hosted. Sorry, I have no an idea what they did. Kirill
