Re: [PATCH 4/4] mm: shrinker: make shrinker not depend on memcg kmem

[Yang Shi]

On 6/11/19 7:52 PM, Kirill A. Shutemov wrote:
> On Fri, Jun 07, 2019 at 02:07:39PM +0800, Yang Shi wrote:
> > Currently shrinker is just allocated and can work when memcg kmem is
> > enabled.  But, THP deferred split shrinker is not slab shrinker, it
> > doesn't make too much sense to have such shrinker depend on memcg kmem.
> > It should be able to reclaim THP even though memcg kmem is disabled.
> >
> > Introduce a new shrinker flag, SHRINKER_NONSLAB, for non-slab shrinker,
> > i.e. THP deferred split shrinker.  When memcg kmem is disabled, just
> > such shrinkers can be called in shrinking memcg slab.
> Looks like it breaks bisectability. It has to be done before makeing
> shrinker memcg-aware, hasn't it?

No, it doesn't break bisectability. But, THP shrinker just can be called 
with kmem charge enabled without this patch.

>