On Thu, 10 Mar 2011, Oleg Nesterov wrote: > > That leader may exit and leave behind several other > > threads > > No, it can't. > > More precisely, it can, and it can even exit _before_ this process starts > to use a lot of memory, then later this process can be oom-killed. > > But, until all threads disappear, the leader can't go away and > for_each_process() must see it. > for_each_process() sees the parent, but it is filtered because we no longer consider threads without an ->mm. We only want to pass threads with valid ->mm pointers to oom_badness(), otherwise it ignores the thread anyway. Please note that Andrey's patch to filter !p->mm is nothing new, it's more of a cleanup. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>