On 11/15/2010 12:00 PM, Jeremy Fitzhardinge wrote:
>
> Another approach I discussed with PeterZ and Mathieu is to steal the LSB
> of the ticket counters (halving the max CPU count) to use as a "there is
> someone in slowpath waiting on this lock". But I haven't spent the time
> to work out an algorithm to maintain that flag (or flags, since there
> are bits available) in a correct and efficient way.
>
Definitely worth pondering.
-hpa
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