On Wed, 16 Apr 2014 17:13:18 -0400 Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > Per-memcg swappiness and oom killing can currently not be tweaked on a > memcg that is part of a hierarchy, but not the root of that hierarchy. > Users have complained that they can't configure this when they turned > on hierarchy mode. In fact, with hierarchy mode becoming the default, > this restriction disables the tunables entirely. > > But there is no good reason for this restriction. The settings for > swappiness and OOM killing are taken from whatever memcg whose limit > triggered reclaim and OOM invocation, regardless of its position in > the hierarchy tree. > > Allow setting swappiness on any group. The knob on the root memcg > already reads the global VM swappiness, make it writable as well. > > Allow disabling the OOM killer on any non-root memcg. Documentation/cgroups/memory.txt needs updates? -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>