On 04/01/2014 02:21 PM, Johannes Weiner wrote:
>
> Either way, optimistic volatile pointers are nowhere near as
> transparent to the application as the above description suggests,
> which makes this usecase not very interesting, IMO.
>
... however, I think you're still derating the value way too much. The
case of user space doing elastic memory management is more and more
common, and for a lot of those applications it is perfectly reasonable
to either not do system calls or to have to devolatilize first.
-hpa
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