July 10, 2013
Participants: Michal Hocko, Balbir Singh,
People tagged: Tejun Heo.
Michal Hocko,
memory cgroups maintainer, proposes memcg discussions surrounding
lowlimit/reclaim_threshold knobs to provide memory guarantees for
cgroups and cgroup hierarchies.
Tejun Heo objected to this functionality being provided via the existing
soft_limit knob, so it would be good to discuss viable
alternatives.
Michal would also like to discuss the dirty-page accounting (which
appears to be well on its way to mainline) and the possibility of
dirty-page throttling (which does not).
He would also like to discuss userspace control of OOM handling,
including the possibility of reusing oom_control,
which is favored by Google.
Other options include allowing kernel modules to handle OOM conditions
or to allow a scripted interface.
Balbir Singh argues that VM overcommit should precede dirty-page throttling, and suggests that once VM overcommit is in place, the existing per-block-device throttlers should be made cgroup-aware.