Re: [PATCH] mm: provide interface for retrieving kmem_cache name

[Knut Omang]

On Fri, 2019-11-08 at 15:37 +0000, Christopher Lameter wrote:
> On Thu, 7 Nov 2019, Michal Hocko wrote:
> 
> > On Thu 07-11-19 13:26:09, Knut Omang wrote:
> > > On Thu, 2019-11-07 at 12:58 +0100, Michal Hocko wrote:
> > > > On Thu 07-11-19 12:54:04, Knut Omang wrote:
> > > > > With the restructuring done in commit 9adeaa226988
> > > > > ("mm, slab: move memcg_cache_params structure to mm/slab.h")
> > > > >
> > > > > it is no longer possible for code external to mm to access
> 
> That patch only affected the memcg_cache_params structure and not
> kmem_cache.
> 
> And I do not see any references to the memcg_cache_param?

Good point, I should have made explicit reference to it. 

It gets inlined into kmem_cache with CONFIG_SLUB if CONFIG_MEMCG is set
(include/linux/slub_def.h, line 112)

> The fields that all allocators need to expose are listed in
> the struct kmme_cache definition in linux/mm/slab.h.

So I take that kmem_cache::name was still intended to be public, 
just that that broke due to the inlining of struct memcg_cache_param 
in slub_def.h?

Knut