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Subject[PATCH -mm 0/6] memcg: release memcg_cache_id on css offline
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Hi,

Currently memcg_cache_id (mem_cgroup->kmemcg_id), which is used for
indexing memcg_caches arrays, is released only on css free. As a result,
offline css, whose number is actually limited only by amount of free
RAM, will occupy slots in these arrays making them grow larger and
larger even if there's only a few kmem active memory cgroups out there.

This patch set makes memcg release memcg_cache_id on css offline. This
way the memcg_caches arrays size will be limited by the number of alive
kmem-active memory cgroups, which is much better.

The work is actually done in patch 6 while patches 1-5 only prepare
memcg and slab subsystems to this change.

Thanks,

Vladimir Davydov (6):
slub: remove kmemcg id from create_unique_id
slab: use mem_cgroup_id for per memcg cache naming
memcg: make memcg_cache_id static
memcg: add pointer to owner cache to memcg_cache_params
memcg: keep all children of each root cache on a list
memcg: release memcg_cache_id on css offline

include/linux/memcontrol.h | 9 +---
include/linux/slab.h | 7 ++-
mm/memcontrol.c | 112 +++++++++++++++++++++++++++-----------------
mm/slab.c | 40 +++++++++-------
mm/slab_common.c | 44 ++++++++---------
mm/slub.c | 45 +++++++++---------
6 files changed, 140 insertions(+), 117 deletions(-)

--
1.7.10.4



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