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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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