Re: [PATCH 0/7] memcg targeted shrinking

[Greg Thelen <gthelen@google.com>]

On Fri, Feb 08 2013, Glauber Costa wrote:

> This patchset implements targeted shrinking for memcg when kmem limits are
> present. So far, we've been accounting kernel objects but failing allocations
> when short of memory. This is because our only option would be to call the
> global shrinker, depleting objects from all caches and breaking isolation.
>
> This patchset builds upon the recent work from David Chinner
> (http://oss.sgi.com/archives/xfs/2012-11/msg00643.html) to implement NUMA
> aware per-node LRUs. I build heavily on its API, and its presence is implied.
>
> The main idea is to associate per-memcg lists with each of the LRUs. The main
> LRU still provides a single entry point and when adding or removing an element
> from the LRU, we use the page information to figure out which memcg it belongs
> to and relay it to the right list.
>
> This patchset is still not perfect, and some uses cases still need to be
> dealt with. But I wanted to get this out in the open sooner rather than
> later. In particular, I have the following (noncomprehensive) todo list:
>
> TODO:
> * shrink dead memcgs when global pressure kicks in.
> * balance global reclaim among memcgs.
> * improve testing and reliability (I am still seeing some stalls in some cases)

Do you have a git tree with these changes so I can see Dave's numa LRUs
plus these changes?

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