Re: kmemcheck caught read from freed memory (cfq_free_io_context)

[Pekka Enberg]

Hi Paul,

On Wed, Apr 2, 2008 at 1:40 PM, Paul E. McKenney
<paulmck@xxxxxxxxxxxxxxxxxx> wrote:
>  I am still confused.
>
>  o       The kmem_cache has SLAB_DESTROY_BY_RCU.
>
>  o       This means that a given slab should not be returned to the
>         system until a grace period elapses.

Yeah, that's what I thought too, that this is a SLUB bug but Peter
convinced me otherwise. SLUB keeps the _page_ around so the pointer
will be _valid_, although it might not be _your_ pointer so the caller
needs to do some validation step. Or at least that's how I understood
what Peter was saying.

                      Pekka
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