| From: |
| Johannes Weiner <hannes@cmpxchg.org> |
| To: |
| linux-mm@kvack.org |
| Subject: |
| [patch 0/3] mm: memcontrol: eliminate charge reparenting |
| Date: |
| Sat, 20 Sep 2014 16:00:32 -0400 |
| Message-ID: |
| <1411243235-24680-1-git-send-email-hannes@cmpxchg.org> |
| Cc: |
| Michal Hocko <mhocko@suse.cz>, Vladimir Davydov <vdavydov@parallels.com>, Greg Thelen <gthelen@google.com>, Tejun Heo <tj@kernel.org>, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org |
| Archive‑link: | |
Article |
Hi,
we've come a looong way when it comes to the basic cgroups model, and
the recent changes there open up a lot of opportunity to make drastic
simplifications to memory cgroups as well.
The decoupling of css from the user-visible cgroup, word-sized per-cpu
css reference counters, and css iterators that include offlined groups
means we can take per-charge css references, continue to reclaim from
offlined groups, and so get rid of the error-prone charge reparenting.
Combined with the higher-order reclaim fixes, lockless page counters,
and memcg iterator simplification I sent on Friday, the memory cgroup
core code is finally no longer the biggest file in mm/. Yay!
These patches are based on mmotm + the above-mentioned changes + Tj's
percpu-refcount conversion to atomic_long_t.
Thanks!
include/linux/cgroup.h | 26 +++
include/linux/percpu-refcount.h | 43 ++++-
mm/memcontrol.c | 337 ++------------------------------------
3 files changed, 75 insertions(+), 331 deletions(-)
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