Messages in this thread | | | Date | Wed, 16 Apr 2014 14:34:25 -0700 | From | Andrew Morton <> | Subject | Re: [patch] mm: memcontrol: remove hierarchy restrictions for swappiness and oom_control |
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On Wed, 16 Apr 2014 17:13:18 -0400 Johannes Weiner <hannes@cmpxchg.org> 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?
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