On Tue 26-07-11 15:05:23, David Rientjes wrote: > On Tue, 26 Jul 2011, Michal Hocko wrote: > > > > After selecting a task to kill, the oom killer iterates all processes and > > > kills all other threads that share the same mm_struct in different thread > > > groups. It would not otherwise be helpful to kill a thread if its memory > > > would not be subsequently freed. > > > > > > A kernel thread, however, may assume a user thread's mm by using > > > use_mm(). This is only temporary and should not result in sending a > > > SIGKILL to that kthread. > > > > Good catch. Have you ever seen this happening? > > > > No, this is just another patch to make the kernel more use_mm()-friendly. > Before that capability was introduced, it was possible to assume that a > kthread would always have a NULL mm pointer, so it wasn't previously > required for this code. OK Thanks -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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>