Re: [RFC PATCH RT] rwsem: The return of multi-reader PI rwsems

[Mike Galbraith]

Oh, there was another useful bit. 

3.12.17-rt25       403991     384216     377786
                   405466     394011     392850

3.12.17-nopreempt  109049     186133     118766  !?!.. ew, TTWU_QUEUE
                   350385     318786     367336  !TTWU_QUEUE
                   326009     356939     378215  !TTWU_QUEUE

IPI == low-pass filter.

-Mike

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