[Devel] [PATCH -mm v2 1/2] sl[au]b: charge slabs to kmemcg explicitly

[Greg Thelen]

On Tue, Apr 01 2014, Vladimir Davydov <vdavydov at parallels.com> wrote:

> We have only a few places where we actually want to charge kmem so
> instead of intruding into the general page allocation path with
> __GFP_KMEMCG it's better to explictly charge kmem there. All kmem
> charges will be easier to follow that way.
>
> This is a step towards removing __GFP_KMEMCG. It removes __GFP_KMEMCG
> from memcg caches' allocflags. Instead it makes slab allocation path
> call memcg_charge_kmem directly getting memcg to charge from the cache's
> memcg params.
>
> This also eliminates any possibility of misaccounting an allocation
> going from one memcg's cache to another memcg, because now we always
> charge slabs against the memcg the cache belongs to. That's why this
> patch removes the big comment to memcg_kmem_get_cache.
>
> Signed-off-by: Vladimir Davydov <vdavydov at parallels.com>

Acked-by: Greg Thelen <gthelen at google.com>