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SubjectRe: [PATCH RFC] fix RCU-callback-after-kmem_cache_destroy problem in sl[aou]b
On Tue, 30 Jun 2009, Pekka Enberg wrote:

> I don't even claim to understand all the RCU details here but I don't
> see why we should care about _kmem_cache_destroy()_ performance at
> this level. Christoph, hmmm?

Well it was surprising to me that kmem_cache_destroy() would perform rcu
actions in the first place. RCU is usually handled externally and not
within the slab allocator. The only reason that SLAB_DESTROY_BY_RCU exists
is because the user cannot otherwise control the final release of memory
to the page allocator.




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