Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on80386 and 80486

[Christoph Lameter]

On Mon, 20 Aug 2007, Mathieu Desnoyers wrote:

> Yes, I use it as synchronization mechanism for my buffer management algorithm
> in LTTng. Since I write in per-cpu buffers and want to be as reentrant
> as possible wrt other contexts (dealing with NMI as worse case, but also
> applies to MCE..), I use local_cmpxchg to reserve space in my buffers.
> It is faster than the standard cmpxchg.

Ok I have seen these numbers in the OLS papers but I could not reproduce 
them in SLUB.

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