Re: [RFC] Lock free fd lookup

[Manfred Spraul]

wli wrote

> > * It requires type stable storage.  That is, once a data area has been
> >   allocated to a particular structure type, it always contains that
> >   structure type, even when it has been freed from the list.  Each list
> >   requires its own free pool, which can never be returned to the OS.
>
> The last of these is particularly lethal.
>  
It might be possible to combine such a lock free algorithms with RCU and 
then set Hugh's SLAB_DESTROY_BY_RCU: It inserts a call_rcu between 
leaving the free pool and returning the page to the OS.

--
   Manfred
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