On Wed, 2011-06-15 at 14:12 -0700, Tim Chen wrote:

Thanks to Andi for providing the info.  We've used this workaround in
our testing so it will not mask true kernel scaling bottlenecks.

http://programming.kicks-ass.net/sekrit/39-2.txt.bz2
http://programming.kicks-ass.net/sekrit/tip-2.txt.bz2

tip+sirq+linus is still slightly faster than .39 here, although removing
that sysconf() wreckage closed the gap considerably (needing to know the
number of cpus to optimize locking sounds like a trainwreck all of its
own, needing it _that_ often instead of just once at startup is even
worse).

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