Re: [PATCH v3] mm/slab: Improve performance of gathering slabinfo stats

[Eric Dumazet]

On Wed, 2016-08-17 at 11:20 -0700, Aruna Ramakrishna wrote:
]
> -             list_for_each_entry(page, &n->slabs_full, lru) {
> -                     if (page->active != cachep->num && !error)
> -                             error = "slabs_full accounting error";
> -                     active_objs += cachep->num;
> -                     active_slabs++;
> -             }

Since you only removed this loop, you could track only number of
full_slabs.

This would avoid messing with n->num_slabs all over the places in fast
path.

Please also update slab_out_of_memory()