On Wed, 22 Jun 2011, KOSAKI Motohiro wrote: > CAI Qian reported oom-killer killed all system daemons in his > system at first if he ran fork bomb as root. The problem is, > current logic give them bonus of 3% of system ram. Example, > he has 16GB machine, then root processes have ~500MB oom > immune. It bring us crazy bad result. _all_ processes have > oom-score=1 and then, oom killer ignore process memroy usage > and kill random process. This regression is caused by commit > a63d83f427 (oom: badness heuristic rewrite). > Isn't it better to give admin processes a proportional bonus instead of a strict 3% bonus? I suggested 1% per 10% of memory used earlier and I think it would work quite well as an alternative to this. The highest bonus that would actually make any differences in which thread to kill would be 5% when an admin process is using 50% of memory: in that case, another non-admin thread would have to be using >45% of memory to be killed instead. Would you be satisfied with something like points -= (points * 10 / totalpages); be better? -- 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>