On Mon, 19 Dec 2011, Minchan Kim wrote: > Kernel should have just signal role when resource is not enough. > It is desirable that killing is role of user space. The low memory killer becomes an out of memory killer very quickly if (1) userspace can't respond fast enough and (2) the killed thread cannot exit and free its memory fast enough. It also requires userspace to know which threads are sharing memory such that they may all be killed; otherwise, killing one thread won't lead to future memory freeing. If the system becomes oom before userspace can kill a thread, then there's no guarantee that it will ever be able to exit. That's fixed in the kernel oom killer by allowing special access to memory reserves specifically for this purpose, which userspace can't provide. So the prerequisites for this to work correctly every time would be to ensure that points (1) and (2) above can always happen. I'm not seeing where that's proven, so presumably you'd still always need the kernel oom killer. -- 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>