Re: [PATCH v1] [mm] Set page->slab_cache for every page allocated for a kmem_cache.

[Christoph Lameter]

On Fri, 27 May 2016, Alexander Potapenko wrote:

> It's reasonable to rely on the fact that for every page allocated for a
> kmem_cache the |slab_cache| field points to that cache. Without that it's
> hard to figure out which cache does an allocated object belong to.

The flags are set only in the head page of a coumpound page which is used
by SLAB. No need to do this. This would just mean unnecessarily dirtying
struct page cachelines on allocation.