Re: [PATCH 3/6] locking/rwsem: Set lock ownership ASAP

[Davidlohr Bueso]

On Tue, 2015-01-27 at 18:10 +0100, Peter Zijlstra wrote:
> This is the thing I suggested
> lkml.kernel.org/r/20150108103708.GE29390@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> there right?

Yeah.

> Do you have numbers for how much this gained?

This is more of a correctness patch, nothing really tangible for
performance -- although I did note a 5% tp increase as that particular
workload, as pounds on the osq so we have to wait for the node->next
pointer. Otherwise, the window between when we set the lock is taken and
owner is set is very small.

Thanks,
Davidlohr


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