On Thu, May 12, 2011 at 7:53 AM, Johannes Weiner <hannes@cmpxchg.org> wrote:

> Hi!
>
> Here is a patch series that is a result of the memcg discussions on
> LSF (memcg-aware global reclaim, global lru removal, struct
> page_cgroup reduction, soft limit implementation) and the recent
> feature discussions on linux-mm.
>
> The long-term idea is to have memcgs no longer bolted to the side of
> the mm code, but integrate it as much as possible such that there is a
> native understanding of containers, and that the traditional !memcg
> setup is just a singular group.  This series is an approach in that
> direction.
>
> It is a rather early snapshot, WIP, barely tested etc., but I wanted
> to get your opinions before further pursuing it.  It is also part of
> my counter-argument to the proposals of adding memcg-reclaim-related
> user interfaces at this point in time, so I wanted to push this out
> the door before things are merged into .40.
>

The memcg-reclaim-related user interface I assume was the watermark
configurable tunable
we were talking about in the per-memcg background reclaim patch. I think we
got some agreement
to remove the watermark tunable at the first step. But the newly added
memory.soft_limit_async_reclaim
as you proposed seems to be a usable interface.


>
> The patches are quite big, I am still looking for things to factor and
> split out, sorry for this.  Documentation is on its way as well ;)
>

This is a quite bit patchset includes different part. We might want to split
it into steps. I will read them through
now.

--Ying

>
> #1 and #2 are boring preparational work.  #3 makes traditional reclaim
> in vmscan.c memcg-aware, which is a prerequisite for both removal of
> the global lru in #5 and the way I reimplemented soft limit reclaim in
> #6.
>
> The diffstat so far looks like this:
>
>  include/linux/memcontrol.h  |   84 +++--
>  include/linux/mm_inline.h   |   15 +-
>  include/linux/mmzone.h      |   10 +-
>  include/linux/page_cgroup.h |   35 --
>  include/linux/swap.h        |    4 -
>  mm/memcontrol.c             |  860
> +++++++++++++------------------------------
>  mm/page_alloc.c             |    2 +-
>  mm/page_cgroup.c            |   39 +--
>  mm/swap.c                   |   20 +-
>  mm/vmscan.c                 |  273 +++++++--------
>  10 files changed, 452 insertions(+), 890 deletions(-)
>
> It is based on .39-rc7 because of the memcg churn in -mm, but I'll
> rebase it in the near future.
>
> Discuss!
>
>        Hannes
>