[Xen-devel] Re: [PATCH 00/20] x86: ticket lock rewrite and paravirtualization

[Peter Zijlstra <peterz@xxxxxxxxxxxxx>]

On Mon, 2010-11-15 at 13:02 -0800, Jeremy Fitzhardinge wrote:
> 
> As a heuristic, it shouldn't be too bad performancewise, since
> (handwaving) if ticketholder N has entered the slowpath, then its likely
> that N+1 will as well. 

Yes, esp. if the whole slow unlock path takes more cycles than you spin
for to begin with.

I think this approach is definitely worth trying.

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