Re: [PATCH v2 04/29] slub: always get the cache from its page inkfree

From: Christoph Lameter
Date: Fri May 11 2012 - 14:06:40 EST

On Fri, 11 May 2012, Glauber Costa wrote:

> > Adding a VM_BUG_ON may be useful to make sure that kmem_cache_free is
> > always passed the correct slab cache.
> Well, problem is , it isn't always passed the "correct" slab cache.
> At least not after this series, since we'll have child caches associated with
> the main cache.
> So we'll pass, for instance, kmem_cache_free(dentry_cache...), but will in
> fact free from the memcg copy of the dentry cache.

Urg. But then please only do this for the MEMCG case and add a fat big
warning in kmem_cache_free.
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